/**
 * Allow frontend response if current user is author of any assigned post of the review.
 *
 * @param \GeminiLabs\SiteReviews\Review $review
 */
add_filter('site-reviews-authors/can/respond', function (bool $canRespond, $review): bool
{
    if (!canRespond) {
        return false;
    }
    foreach ($review->assigned_posts as $postId) {
        if (get_post_field('post_author', $postId) === get_current_user_id()) {
            return true; // user is the author of the assigned page
        }
    }
    return false;
}, 10, 2);