add_filter('woocommerce_product_get_review_count', function ($value, $product) {
    if (!function_exists('glsr_get_ratings')) {
        return $value;
    }
    return glsr_get_ratings(['assigned_posts' => $product->get_id()])->reviews;
}, 15, 2);

add_filter('woocommerce_product_get_average_rating', function ($value, $product) {
    if (!function_exists('glsr_get_ratings')) {
        return $value;
    }
    return glsr_get_ratings(['assigned_posts' => $product->get_id()])->average;
}, 15, 2);