I don't know what's up either, but I have noticed that while all the other Lemmy apps are getting constant updates, I don't think Lemming ever got one since it popped up. Maybe the author got fed up with the whole concept of programming.
Ed: my Obtainium says last update was on 2023-06-28, so I guess it has been, just not in a while.
And Slide's last and first released was 2023-07-01, dang