add_action('after_wcfm_products_manage', function() {
    ?>
    
    
     'product',
        'post_status' => 'any',
        's' => $title,
        'posts_per_page' => 1,
        'post__not_in' => [$product_id],
    ];
    $query = new WP_Query($args);
    if($query->have_posts()) {
        wp_send_json_error('Product with this title already exists');
    } else {
        wp_send_json_success('Product title is available');
    }
});