WordPress Version: 5.9
/**
* Retrieves the permalink for a tag feed.
*
* @since 2.3.0
*
* @param int|WP_Term|object $tag The ID or term object whose feed link will be retrieved.
* @param string $feed Optional. Feed type. Possible values include 'rss2', 'atom'.
* Default is the value of get_default_feed().
* @return string The feed permalink for the given tag.
*/
function get_tag_feed_link($tag, $feed = '')
{
return get_term_feed_link($tag, 'post_tag', $feed);
}