Thanks for the feedback Ill like to proceed with this as my product setup is simple direct transactions and associated product orders only contain a single product related to the post. I set up 1 product per pricing. I dont use multiple products for the same order

I have this example code below

 function delete_pending_post_order($post_id) {
    if (get_post_type($post_id) === 'post') {
        $order_id = get_post_meta($post_id, '_order_id', true);

        if ($order_id) {
            $order = wc_get_order($order_id);

            if ($order && in_array($order->get_status(), array('pending', 'draft'))) {
                $order->delete(true);
            }
        }
    }
}
add_action('before_delete_post', 'delete_pending_post_order'); 

Thanks Ravi After giving this a better thought I think emptying woocommerec cart might be better so I edited your code

 function empty_cart_pending_post_order( $post_id, $post ) {
	if ( empty( $post->post_type ) || 'post' !== $post->post_type ) {
		return;
	}

	if ( ! function_exists( 'bbl_ppp_get_post_order_id' ) || ! function_exists( 'wc_get_order' ) || ! function_exists( 'WC' ) ) {
		return;
	}

	$order_id = bbl_ppp_get_post_order_id( $post_id );

	if ( $order_id ) {
		$order = wc_get_order( $order_id );

		if ( $order && in_array( $order->get_status(), array( 'pending', 'draft' ) ) ) {
			// Empty the cart instead of deleting the order.
			WC()->cart->empty_cart();
		}
	}
}
add_action( 'before_delete_post', 'empty_cart_pending_post_order', 10, 2 );