Gentle Reminder sir,

 <?php
/**
 * Plugin Name: BuddyPress Notifications Management Tool
 * Description: Manually or automatically delete BuddyPress user notifications based on age or schedule.
 * Version: 2.3.2
 * License: GPLv2 or later
 * Requires at least: 5.6
 * Requires PHP: 7.4
 * Requires Plugins: buddypress
 * Text Domain: bp-notifications-cleanup
 */

defined( 'ABSPATH' ) || exit;

class BP_Delete_All_Notifications_Auto {

    private $opt_schedule = 'bp_delete_notifications_schedule';
    private $opt_days     = 'bp_delete_notifications_days';
    const CRON_HOOK = 'bp_delete_all_notifications_cron';
    const CHUNK_SIZE = 1000;
    const NONCE_ACTION = 'delete_all_bp_notifications_action';
    const NONCE_NAME = 'delete_all_bp_notifications_nonce';

    public function __construct() {
        add_action( 'admin_menu', array( $this, 'add_admin_menu' ) );
        add_action( 'admin_post_delete_all_bp_notifications', array( $this, 'handle_delete_notifications' ) );
        add_action( 'admin_notices', array( $this, 'admin_notices' ) );
        add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_confirmation_script' ) );
        add_action( 'admin_init', array( $this, 'register_settings' ) );
        add_action( self::CRON_HOOK, array( $this, 'cron_cleanup' ) );
        add_filter( 'cron_schedules', array( $this, 'filter_cron_schedules' ) );
        register_activation_hook( __FILE__, array( $this, 'activate' ) );
        register_deactivation_hook( __FILE__, array( $this, 'deactivate' ) );
        register_uninstall_hook( __FILE__, array( __CLASS__, 'uninstall' ) );
        $this->maybe_schedule_cron();
        
        // BuddyPress dependency notice
        add_action( 'admin_notices', array( $this, 'buddypress_missing_notice' ) );
    }

    public function add_admin_menu() {
        if ( ! current_user_can( 'manage_options' ) ) {
            return;
        }

        // Only show if notifications component is active
        if ( ! $this->is_notifications_component_active() ) {
            return;
        }

        add_submenu_page(
            'tools.php',
            __( 'BP Notification Cleanup', 'bp-notifications-cleanup' ),
            __( 'BP Notification Cleanup', 'bp-notifications-cleanup' ),
            'manage_options',
            'delete-bp-notifications',
            array( $this, 'admin_page_content' )
        );
    }

    public function admin_page_content() {
        if ( ! current_user_can( 'manage_options' ) ) {
            return;
        }

        $schedule = get_option( $this->opt_schedule, 'none' );
        $days     = get_option( $this->opt_days, 30 );
        ?>
        <div class="wrap">
            <h1><?php esc_html_e( 'BuddyPress Notification Cleanup', 'bp-notifications-cleanup' ); ?></h1>
            <?php if ( ! $this->is_notifications_component_active() ) : ?>
                <div class="notice notice-error">
                    <p><?php esc_html_e( 'BuddyPress Notifications component is not active.', 'bp-notifications-cleanup' ); ?></p>
                </div>
            <?php else : ?>
                <div class="card">
                    <h2><?php esc_html_e( 'Manual Delete', 'bp-notifications-cleanup' ); ?></h2>
                    <p><?php esc_html_e( 'This will permanently delete all notifications for all users.', 'bp-notifications-cleanup' ); ?></p>
                    <p><?php esc_html_e( 'Total Notifications:', 'bp-notifications-cleanup' ); ?> 
                        <strong><?php echo esc_html( number_format_i18n( $this->get_notifications_count() ) ); ?></strong>
                    </p>
                    <form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>" id="bp-delete-notifications-form">
                        <?php wp_nonce_field( self::NONCE_ACTION, self::NONCE_NAME ); ?>
                        <input type="hidden" name="action" value="delete_all_bp_notifications">
                        <p>
                            <input type="submit" class="button button-danger" value="<?php esc_attr_e( 'Delete All Notifications', 'bp-notifications-cleanup' ); ?>">
                        </p>
                    </form>
                </div>
                <hr>
                <div class="card">
                    <h2><?php esc_html_e( 'Auto Cleanup Settings', 'bp-notifications-cleanup' ); ?></h2>
                    <form method="post" action="options.php">
                        <?php
                        settings_fields( 'bp_notifications_cleanup_settings' );
                        do_settings_sections( 'bp_notifications_cleanup' );
                        submit_button( __( 'Save Settings', 'bp-notifications-cleanup' ) );
                        ?>
                    </form>
                    <p>
                        <?php esc_html_e( 'Schedule:', 'bp-notifications-cleanup' ); ?> 
                        <strong><?php echo esc_html( ucfirst( $schedule ) ); ?></strong>
                    </p>
                    <p>
                        <?php esc_html_e( 'Retention Days:', 'bp-notifications-cleanup' ); ?> 
                        <strong><?php echo esc_html( $days ); ?></strong>
                        (<?php esc_html_e( 'Notifications older than this will be deleted.', 'bp-notifications-cleanup' ); ?>)
                    </p>
                    <?php if ( 'none' !== $schedule ) : ?>
                        <p>
                            <?php esc_html_e( 'Next scheduled cleanup:', 'bp-notifications-cleanup' ); ?>
                            <strong>
                                <?php
                                $next = wp_next_scheduled( self::CRON_HOOK );
                                if ($next) {
                                    $format = get_option('date_format') . ' ' . get_option('time_format');
                                    $timestamp = $next + (get_option('gmt_offset') * HOUR_IN_SECONDS);
                                    echo esc_html(date_i18n($format, $timestamp));
                                } else {
                                    esc_html_e('Not scheduled', 'bp-notifications-cleanup');
                                }
                                ?>
                            </strong>
                        </p>
                    <?php endif; ?>
                </div>
            <?php endif; ?>
        </div>
        <?php
    }

    public function handle_delete_notifications() {
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( esc_html__( 'Permission denied', 'bp-notifications-cleanup' ) );
        }
        
        check_admin_referer( self::NONCE_ACTION, self::NONCE_NAME );
        
        $nonce    = wp_create_nonce( 'notifications_deleted' );
        $redirect = admin_url( 'tools.php?page=delete-bp-notifications' );
        
        try {
            $this->perform_chunked_deletion();
            $redirect = add_query_arg( array( 'deleted' => 1, '_wpnonce' => $nonce ), $redirect );
        } catch ( Exception $e ) {
            error_log( 'BP Notification Cleanup Error: ' . $e->getMessage() );
            $redirect = add_query_arg( array( 'error' => 1 ), $redirect );
        }
        
        wp_safe_redirect( $redirect );
        exit;
    }

    private function perform_chunked_deletion() {
        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        
        if ( ! $this->table_exists( $table ) ) {
            return;
        }

        $continue = true;
        $chunk_size = self::CHUNK_SIZE;

        while ( $continue ) {
            $query = "DELETE FROM <code>&quot; . esc_sql( $table ) . &quot;</code> LIMIT {$chunk_size}";
            $rows_affected = $wpdb->query( $query ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
            
            if ( $rows_affected === false ) {
                throw new Exception( 'Database error during chunked deletion' );
            }
            
            if ( $rows_affected < $chunk_size ) {
                $continue = false;
            }
            
            // Prevent server overload
            if ( $rows_affected > 0 ) {
                usleep( 100000 ); // 0.1 second delay between chunks
            }
        }
    }

    public function cron_cleanup() {
        // Only run if notifications component is active
        if ( ! $this->is_notifications_component_active() ) {
            return;
        }

        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        
        if ( ! $this->table_exists( $table ) ) {
            return;
        }
        
        $days = absint( get_option( $this->opt_days, 30 ) );
        if ( $days <= 0 ) {
            return;
        }

        $continue = true;
        $chunk_size = self::CHUNK_SIZE;

        while ( $continue ) {
            $query = $wpdb->prepare(
                "DELETE FROM <code>&quot; . esc_sql( $table ) . &quot;</code> 
                WHERE date_notified < ( NOW() - INTERVAL %d DAY )
                LIMIT %d",
                $days,
                $chunk_size
            );
            
            $rows_affected = $wpdb->query( $query ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
            
            if ( $rows_affected === false ) {
                error_log( 'BP Notification Cron Cleanup Error: Database query failed' );
                break;
            }
            
            if ( $rows_affected < $chunk_size ) {
                $continue = false;
            }
            
            // Prevent server overload
            if ( $rows_affected > 0 ) {
                usleep( 100000 ); // 0.1 second delay between chunks
            }
        }
    }

    public function admin_notices() {
        if ( ! isset( $_GET['page'] ) || 'delete-bp-notifications' !== $_GET['page'] ) {
            return;
        }

        if ( isset( $_GET['deleted'] ) && isset( $_GET['_wpnonce'] ) && wp_verify_nonce( sanitize_key( $_GET['_wpnonce'] ), 'notifications_deleted' ) ) {
            echo '<div class="notice notice-success is-dismissible"><p>' . 
                 esc_html__( 'All BuddyPress notifications deleted.', 'bp-notifications-cleanup' ) . 
                 '</p></div>';
        }

        if ( isset( $_GET['error'] ) ) {
            echo '<div class="notice notice-error is-dismissible"><p>' . 
                 esc_html__( 'Error deleting notifications. Please check logs.', 'bp-notifications-cleanup' ) . 
                 '</p></div>';
        }
    }
    
    public function buddypress_missing_notice() {
        // Skip if BuddyPress is active
        if ( function_exists( 'buddypress' ) ) {
            return;
        }
        
        // Skip if we're on our own settings page
        $screen = get_current_screen();
        if ( $screen && isset( $screen->id ) && 'tools_page_delete-bp-notifications' === $screen->id ) {
            return;
        }
        
        echo '<div class="notice notice-error"><p>' . 
             esc_html__( 'BuddyPress Delete Notifications requires BuddyPress to be installed and activated.', 'bp-notifications-cleanup' ) . 
             '</p></div>';
    }

    public function enqueue_confirmation_script( $hook ) {
        if ( 'tools_page_delete-bp-notifications' !== $hook ) {
            return;
        }

        $message = __( 'This will permanently delete ALL notifications. Continue?', 'bp-notifications-cleanup' );
        wp_add_inline_script(
            'jquery',
            'jQuery(document).ready(function($){
                $("#bp-delete-notifications-form").on("submit", function(e){
                    if(!confirm("' . esc_js( $message ) . '")) {
                        e.preventDefault();
                    }
                });
            });'
        );
    }

    private function get_notifications_count() {
        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        
        if ( ! $this->table_exists( $table ) ) {
            return 0;
        }
        
        try {
            return (int) $wpdb->get_var( "SELECT COUNT(*) FROM <code>&quot; . esc_sql( $table ) . &quot;</code>" ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
        } catch ( Exception $e ) {
            error_log( 'BP Notification Count Error: ' . $e->getMessage() );
            return 0;
        }
    }

    public function register_settings() {
        register_setting(
            'bp_notifications_cleanup_settings',
            $this->opt_schedule,
            array(
                'type'              => 'string',
                'sanitize_callback' => array( $this, 'sanitize_schedule' ),
                'default'           => 'none',
            )
        );
        register_setting(
            'bp_notifications_cleanup_settings',
            $this->opt_days,
            array(
                'type'              => 'integer',
                'sanitize_callback' => array( $this, 'sanitize_retention_days' ),
                'default'           => 30,
            )
        );
        
        add_settings_section(
            'bp_notifications_cleanup_section',
            __( 'Cleanup Options', 'bp-notifications-cleanup' ),
            null,
            'bp_notifications_cleanup'
        );
        
        add_settings_field(
            'schedule',
            __( 'Cleanup Schedule', 'bp-notifications-cleanup' ),
            array( $this, 'schedule_field_cb' ),
            'bp_notifications_cleanup',
            'bp_notifications_cleanup_section'
        );
        
        add_settings_field(
            'days',
            __( 'Retention Days', 'bp-notifications-cleanup' ),
            array( $this, 'days_field_cb' ),
            'bp_notifications_cleanup',
            'bp_notifications_cleanup_section'
        );
    }

    public function schedule_field_cb() {
        $v = get_option( $this->opt_schedule, 'none' );
        ?>
        <select name="<?php echo esc_attr( $this->opt_schedule ); ?>">
            <option value="none" <?php selected( $v, 'none' ); ?>>
                <?php esc_html_e( 'None', 'bp-notifications-cleanup' ); ?>
            </option>
            <option value="daily" <?php selected( $v, 'daily' ); ?>>
                <?php esc_html_e( 'Daily', 'bp-notifications-cleanup' ); ?>
            </option>
            <option value="weekly" <?php selected( $v, 'weekly' ); ?>>
                <?php esc_html_e( 'Weekly', 'bp-notifications-cleanup' ); ?>
            </option>
            <option value="monthly" <?php selected( $v, 'monthly' ); ?>>
                <?php esc_html_e( 'Monthly', 'bp-notifications-cleanup' ); ?>
            </option>
        </select>
        <?php
    }

    public function days_field_cb() {
        $v = get_option( $this->opt_days, 30 );
        ?>
        <input type="number" 
               name="<?php echo esc_attr( $this->opt_days ); ?>" 
               value="<?php echo esc_attr( $v ); ?>" 
               min="1" 
               class="small-text" />
        <p class="description">
            <?php esc_html_e( 'Notifications older than this many days will be deleted during automatic cleanup.', 'bp-notifications-cleanup' ); ?>
        </p>
        <?php
    }

    public function sanitize_schedule( $v ) {
        $allowed = array( 'none', 'daily', 'weekly', 'monthly' );
        $v = in_array( $v, $allowed, true ) ? $v : 'none';
        $this->reschedule_cron( $v );
        return $v;
    }
    
    public function sanitize_retention_days( $days ) {
        return max( 1, absint( $days ) );
    }

    private function maybe_schedule_cron() {
        $schedule = get_option( $this->opt_schedule, 'none' );
        if ( 'none' !== $schedule && ! wp_next_scheduled( self::CRON_HOOK ) ) {
            wp_schedule_event( time(), $schedule, self::CRON_HOOK );
        }
    }

    private function reschedule_cron( $new_schedule ) {
        wp_clear_scheduled_hook( self::CRON_HOOK );
        if ( 'none' !== $new_schedule ) {
            wp_schedule_event( time(), $new_schedule, self::CRON_HOOK );
        }
    }

    public function filter_cron_schedules( $schedules ) {
        if ( ! isset( $schedules['monthly'] ) ) {
            $schedules['monthly'] = array(
                'interval' => 30 * DAY_IN_SECONDS,
                'display'  => __( 'Once Monthly (30 days)', 'bp-notifications-cleanup' )
            );
        }
        return $schedules;
    }

    private function table_exists( $table ) {
        global $wpdb;
        return $wpdb->get_var( $wpdb->prepare( 
            "SHOW TABLES LIKE %s", 
            $wpdb->esc_like( $table ) 
        ) ) === $table;
    }
    
    private function is_notifications_component_active() {
        return function_exists( 'bp_is_active' ) && bp_is_active( 'notifications' );
    }

    public function activate() {
        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        
        if ( $this->table_exists( $table ) ) {
            // Check if index exists using SHOW INDEX
            $index_exists = $wpdb->get_var( $wpdb->prepare(
                "SHOW INDEX FROM <code>$table</code> WHERE Key_name = 'date_notified'"
            ) );
            
            if ( ! $index_exists ) {
                $wpdb->query( "ALTER TABLE <code>$table</code> ADD INDEX <code>date_notified</code> (<code>date_notified</code>)" );
            }
        }
        
        $schedule = get_option( $this->opt_schedule, 'none' );
        $this->reschedule_cron( $schedule );
    }

    public function deactivate() {
        wp_clear_scheduled_hook( self::CRON_HOOK );
    }
    
    public static function uninstall() {
        delete_option( 'bp_delete_notifications_schedule' );
        delete_option( 'bp_delete_notifications_days' );
        wp_clear_scheduled_hook( self::CRON_HOOK );
    }
}

new BP_Delete_All_Notifications_Auto(); 

Thanks

UPDATED CODE BELOW

 <?php
/**
 * Plugin Name: BuddyPress Notification Management Tool
 * Description: Manually or automatically delete BuddyPress notifications based on age or schedule.
 * Version: 2.1
 * License: GPLv2 or later
 * Requires at least: 5.6
 * Requires PHP: 7.4
 * Requires Plugins: buddypress
 */
defined( 'ABSPATH' ) || exit;

class BP_Delete_All_Notifications_Auto {

    private $opt_schedule = 'bp_delete_notifications_schedule';
    private $opt_days     = 'bp_delete_notifications_days';
    const CRON_HOOK = 'bp_delete_all_notifications_cron';

    public function __construct() {
        add_action( 'admin_menu', [ $this, 'add_admin_menu' ] );
        add_action( 'admin_post_delete_all_bp_notifications', [ $this, 'handle_delete_notifications' ] );
        add_action( 'admin_notices', [ $this, 'admin_notices' ] );
        add_action( 'admin_enqueue_scripts', [ $this, 'enqueue_confirmation_script' ] );
        add_action( 'admin_init', [ $this, 'register_settings' ] );
        add_action( self::CRON_HOOK, [ $this, 'cron_cleanup' ] );
        add_filter( 'cron_schedules', [ $this, 'filter_cron_schedules' ] );
        register_activation_hook( __FILE__, [ $this, 'activate' ] );
        register_deactivation_hook( __FILE__, [ $this, 'deactivate' ] );
        $this->maybe_schedule_cron();
    }

    public function add_admin_menu() {
        if ( ! function_exists( 'buddypress' ) ) return;
        add_submenu_page(
            'tools.php',
            'BP Notification Cleanup',
            'BP Notification Cleanup',
            'manage_options',
            'delete-bp-notifications',
            [ $this, 'admin_page_content' ]
        );
    }

    public function admin_page_content() {
        if ( ! current_user_can( 'manage_options' ) ) return;
        $schedule = get_option( $this->opt_schedule, 'none' );
        $days     = get_option( $this->opt_days, 30 );
        ?>
        <div class="wrap">
            <h1>BuddyPress Notification Cleanup</h1>
            <?php if ( ! function_exists( 'buddypress' ) ) : ?>
                <div class="notice notice-error"><p>BuddyPress is not active.</p></div>
            <?php else : ?>
                <div class="card">
                    <h2>Manual Delete</h2>
                    <p>This will permanently delete <strong>all</strong> notifications for all users.</p>
                    <p>Total Notifications: <strong><?php echo esc_html( $this->get_notifications_count() ); ?></strong></p>
                    <form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>" id="bp-delete-notifications-form">
                        <?php wp_nonce_field( 'delete_all_bp_notifications_action', 'delete_all_bp_notifications_nonce' ); ?>
                        <input type="hidden" name="action" value="delete_all_bp_notifications">
                        <p><input type="submit" class="button button-danger" value="Delete All Notifications" onclick="return confirm('This cannot be undone. Proceed?')"></p>
                    </form>
                </div>
                <hr>
                <div class="card">
                    <h2>Auto Cleanup Settings</h2>
                    <form method="post" action="options.php">
                        <?php
                        settings_fields( 'bp_notifications_cleanup_settings' );
                        do_settings_sections( 'bp_notifications_cleanup' );
                        submit_button( 'Save Settings' );
                        ?>
                    </form>
                    <p>Schedule: <strong><?php echo esc_html( ucfirst( $schedule ) ); ?></strong></p>
                    <p>Retention Days: <strong><?php echo esc_html( $days ); ?></strong> (Notifications older than this will be deleted.)</p>
                </div>
            <?php endif; ?>
        </div>
        <?php
    }

    public function handle_delete_notifications() {
        if ( ! current_user_can( 'manage_options' ) ) wp_die( 'Permission denied' );
        check_admin_referer( 'delete_all_bp_notifications_action', 'delete_all_bp_notifications_nonce' );
        $this->perform_truncate();
        wp_redirect( admin_url( 'tools.php?page=delete-bp-notifications&deleted=1' ) );
        exit;
    }

    public function perform_truncate() {
        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        if ( $wpdb->get_var( $wpdb->prepare( "SHOW TABLES LIKE %s", $table ) ) === $table ) {
            $wpdb->query( "TRUNCATE TABLE $table" );
        }
    }

    public function cron_cleanup() {
        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        if ( $wpdb->get_var( $wpdb->prepare( "SHOW TABLES LIKE %s", $table ) ) !== $table ) return;
        $days = absint( get_option( $this->opt_days, 30 ) );
        if ( $days > 0 ) {
            $wpdb->query(
                $wpdb->prepare(
                    "DELETE FROM {$table} WHERE date_notified < ( NOW() - INTERVAL %d DAY )",
                    $days
                )
            );
        }
    }

    public function admin_notices() {
        if ( isset( $_GET['page'] ) && $_GET['page'] === 'delete-bp-notifications' && isset( $_GET['deleted'] ) ) {
            echo '<div class="notice notice-success is-dismissible"><p>All BuddyPress notifications deleted.</p></div>';
        }
    }

    public function enqueue_confirmation_script( $hook ) {
        if ( $hook !== 'tools_page_delete-bp-notifications' ) return;
        wp_add_inline_script( 'jquery', '
            jQuery("#bp-delete-notifications-form").on("submit", function(e){
                if(!confirm("This will permanently delete ALL notifications. Continue?")) e.preventDefault();
            });
        ' );
    }

    private function get_notifications_count() {
        global $wpdb;
        $table = $wpdb->prefix . 'bp_notifications';
        return $wpdb->get_var( $wpdb->prepare( "SHOW TABLES LIKE %s", $table ) ) === $table
            ? (int) $wpdb->get_var( "SELECT COUNT(*) FROM $table" )
            : 0;
    }

    public function register_settings() {
        register_setting( 'bp_notifications_cleanup_settings', $this->opt_schedule, [
            'type'              => 'string',
            'sanitize_callback' => [ $this, 'sanitize_schedule' ],
            'default'           => 'none',
        ] );
        register_setting( 'bp_notifications_cleanup_settings', $this->opt_days, [
            'type'              => 'integer',
            'sanitize_callback' => 'absint',
            'default'           => 30,
        ] );
        add_settings_section( 'bp_notifications_cleanup_section', 'Cleanup Options', null, 'bp_notifications_cleanup' );
        add_settings_field( 'schedule', 'Cleanup Schedule', [ $this, 'schedule_field_cb' ], 'bp_notifications_cleanup', 'bp_notifications_cleanup_section' );
        add_settings_field( 'days', 'Retention Days', [ $this, 'days_field_cb' ], 'bp_notifications_cleanup', 'bp_notifications_cleanup_section' );
    }

    public function schedule_field_cb() {
        $v = get_option( $this->opt_schedule, 'none' );
        echo '<select name="'.esc_attr($this->opt_schedule).'">
            <option value="none"'.selected($v,'none',false).'>None</option>
            <option value="daily"'.selected($v,'daily',false).'>Daily</option>
            <option value="weekly"'.selected($v,'weekly',false).'>Weekly</option>
            <option value="monthly"'.selected($v,'monthly',false).'>Monthly</option>
        </select>';
    }

    public function days_field_cb() {
        $v = get_option( $this->opt_days, 30 );
        echo '<input type="number" name="'.esc_attr($this->opt_days).'" value="'.esc_attr($v).'" min="1" />';
    }

    public function sanitize_schedule( $v ) {
        $allowed = [ 'none','daily','weekly','monthly' ];
        $v = in_array( $v, $allowed, true ) ? $v : 'none';
        $this->reschedule_cron( $v );
        return $v;
    }

    private function maybe_schedule_cron() {
        $schedule = get_option( $this->opt_schedule, 'none' );
        if ( $schedule !== 'none' && ! wp_next_scheduled( self::CRON_HOOK ) ) {
            wp_schedule_event( time(), $schedule, self::CRON_HOOK );
        }
    }

    private function reschedule_cron( $new ) {
        wp_clear_scheduled_hook( self::CRON_HOOK );
        if ( $new !== 'none' ) wp_schedule_event( time(), $new, self::CRON_HOOK );
    }

    public function filter_cron_schedules( $s ) {
        $s['monthly'] = [ 'interval' => 30*DAY_IN_SECONDS, 'display' => 'Once Monthly' ];
        return $s;
    }

    public function activate() {
        $this->maybe_schedule_cron();
    }

    public function deactivate() {
        wp_clear_scheduled_hook( self::CRON_HOOK );
    }
}

new BP_Delete_All_Notifications_Auto(); 

Thanks

Thanks Brajesh

This is the code I used can you confirm if its accurate

 /**
 * Assign (Sponsored Post) category to BuddyBlog pay per post articles on checkout.
 */
function assign_sponsored_term_if_paid( $post_id, $form_id ) {
	if ( 'post' !== get_post_type( $post_id ) ) {
		return;
	}

	// Check if post is a paid post by checking if order ID exists.
	$order_id = get_post_meta( $post_id, '_bblpro_ppp_order_id', true );
	if ( ! $order_id ) {
		return;
	}

	// Get the Sponsored Posts term.
	$term = get_term_by( 'name', 'Sponsored Posts', 'content_type' );
	if ( ! $term || is_wp_error( $term ) ) {
		return;
	}

	// Assign Sponsored Posts term to the post (merge with existing).
	wp_set_post_terms( $post_id, array( $term->term_id ), 'content_type', true );
}
add_action( 'bblpro_post_submitted', 'assign_sponsored_term_if_paid', 20, 2 );
add_action( 'bblpro_post_updated', 'assign_sponsored_term_if_paid', 20, 2 );  

Thanks

Gentle reminder sir thanks