Show Custom Post Types in WordPress Dashboard "Recent Activity" Widget

functions.php

<?php // Don't add the opening PHP tag. Instead, add this to your functionality plugin or at the end of functions.php.

//* Add All CPTs to "Recent Activity"
add_filter( 'dashboard_recent_posts_query_args', 'sinickas_dashboard_activity', 10, 1 );
function sinickas_dashboard_activity($query_args) {
    $args = array(
      // Excludes post types that don't show on the front end
        'publicly_queryable' => true 
    );
    $post_types = get_post_types($args);
    $query_args['post_type'] = $post_types;
    return $query_args;
}