If you have tracking or watching on in a topic, if someone uses @all_in_topic it gives a ping and notification (I had this idea instead because @everyone would be too chaotic…
there seems to be a setting that allows you to receive all notifications for a particular post, but it’s on an individual basis.
as far as i can tell, we cannot change how pings work or add new types… if we could, i’d made @moderators actually ping someone, but we work with what we have.