Custom Endpoint Help

I tried to register custom endpoint, but it doesn’t seem to work, nothing appears Endpoint API Caches. Here is my code:

add_action( 'rest_api_init', function () {
  register_rest_route( 'utmsmart', '/(?P<slug>[a-zA-Z0-9-]+)', array(
    'methods' => 'GET',
    'callback' => 'beforeyouarrive_query',
  ) );
} );

/**
 * Register the /wp-json/utmsmart/(?P<slug>[a-zA-Z0-9-]+) endpoint so it will be cached.
 * 
 */
function wprc_add_acf_posts_endpoint( $allowed_endpoints ) {
    if ( ! isset( $allowed_endpoints[ 'utmsmart' ] ) || ! in_array( '/(?P<slug>[a-zA-Z0-9-]+)', $allowed_endpoints[ 'utmsmart' ] ) ) {
        $allowed_endpoints[ 'utmsmart' ][] = '/(?P<slug>[a-zA-Z0-9-]+)';
    }
    return $allowed_endpoints;
}
add_filter( 'wp_rest_cache/allowed_endpoints', 'wprc_add_acf_posts_endpoint', 10, 1);