example code for creating a new column to display number of times a post was favorited by logged in users.

code.php

<?php

// Add a custom column to display favorite count of each post
add_filter('manage_post_posts_columns', 'add_favorited_users_column');
function add_favorited_users_column($columns) {
	
    $columns['favorited_users'] = 'Favorited Count';
    return $columns;
}



// Display the count in our custom column
add_action('manage_post_posts_custom_column', 'show_favorited_users_column_content', 10, 2);
function show_favorited_users_column_content($column, $post_id) {
	
    if ($column == 'favorited_users') {
        echo bricksextras_post_favorite_count( $post_id );
    }
}


// Optional / make column sortable
add_filter('manage_edit-post_sortable_columns', 'register_favorited_users_sortable_column');
function register_favorited_users_sortable_column($sortable_columns) {
    $sortable_columns['favorited_users'] = 'favorited_users';
    return $sortable_columns;
}

// Modify query to sort by the "Favorited Count" column
add_action('pre_get_posts', 'sort_by_favorited_users_column');
function sort_by_favorited_users_column($query) {
    if (!is_admin() || !$query->is_main_query()) {
        return;
    }

    // Check if we're sorting by the "Favorited Count" column
    if ($query->get('orderby') === 'favorited_users') {
        // Order by the count of user IDs in the 'x_favorited_user_ids' post meta
        $query->set('meta_key', 'x_favorited_user_count');
        $query->set('orderby', 'meta_value_num'); // Sort numerically by meta value (count)
    }
}