Hi George,
We can do it by using pre_get_posts filter in the admin and looking for _mpp_media_count meta on the galleries.

I will post this code later today with the other thread(I am sorry I missed to post a solution there).

Thank you
Brajesh

Hi George,
Please use the following code

/**
 * Hide empty MediaPress Gallery from admin galleries list.
 *
 * @param WP_Query $query query object.
 */
function mpp_admin_hide_empty_galleries_from_galleries_page( $query ) {

	if ( ! is_admin() || defined( 'DOING_AJAX' ) || ! $query->is_main_query() ) {
		return;
	}

	if ( $query->get( 'post_type' ) != mpp_get_gallery_post_type() ) {
		return;
	}

	$meta_query = array(
		array(
			'key'     => '_mpp_media_count',
			'value'   => 1,
			'compare' => '>=',
		),
	);

	// side effect: it will override any other meta query for the galleries list.
	$query->set( 'meta_query', $meta_query );
}

add_action( 'pre_get_posts', 'mpp_admin_hide_empty_galleries_from_galleries_page' );

Hope this helps.

Regards
Brajesh

Thank you George.
Good to know that 🙂

Best Regards
Brajesh