I was looking for this, and the ability to hide read posts! Sh.itjust.works has a massive sticky on the instance for new users (which was very helpful when I stumbled my way in from Reddit) but it is stickied to the top of my feed any way I sort, and is annoying.
+1 for compact mode +1 for hiding read posts
They often snuggle in a Yin Yang pattern, it’s too much.