redirect draft post based on category

//REDIRECTS DRAFTED WHATS ON POSTS TO BASE CATEGORY PAGE

add_action('template_redirect', 'redirect_draft_post_in_category');

function redirect_draft_post_in_category() {
    if (is_singular('post')) {
        global $post;

        // Check if the post is a draft
        if ($post->post_status === 'draft') {

            // Replace 'my-category-slug' with your actual category slug
            if (has_category('whats-on', $post)) {

                // Replace with your target URL
                wp_redirect(home_url('/category/whats-on/'));
                exit;
            }
        }
    }
}