Custom search that look only product title and meta field "podnaslov"

How To
1

I’ve tried to solve this with ChatGPT, but no success.
This is code that works only with the meta field. When I input the name of the product search is empty and when “podnaslov” is entered search result is as should be.

function custom_search_filter($query) {
    if (!is_admin() && $query->is_main_query()) {
        if (is_search()) {
            // Limit the search to WooCommerce products
            $query->set('post_type', 'product');

            // Modify the search query to search in "title" and "podnaslov" fields only
            $meta_query = array(
				'relation' => 'OR',
                array(
                    'key'     => 'podnaslov', // Change to the actual custom field name
                    'value'   => get_search_query(),
                    'compare' => 'LIKE',
                ),
            );
            
            $query->set('meta_query', $meta_query);
        }
    }
}

add_action('pre_get_posts', 'custom_search_filter');

Any help is appreciated. TIA.

Best regards,
Goran