I really like the oldest-first ordering of posts of Ekster (my microsub server), but it…

I really like the oldest-first ordering of posts of Ekster (my microsub server), but it means that when you have read everything, that I doesn't show the old posts anymore. It always starts with showing the oldest unread post. I would like to have a way to show the older posts. This could be done with "before" in timelines, but it doesn't seem to be implemented in Monocle for example.