Amazing it’s coming soon! For the mark read button it would be moreso a way to clear the feed above where you are and bring the current position to the top.
Imo a hide read button is superior to your current implementation for 2 reasons: less presses to achieve the action (1 vs your 2) and typically the button is placed at the bottom of the screen where it’s easy to press with your thumb vs yours tucked way up there in the top left corner, making my lazy ass use a second hand 😂
Re: hiding posts - I think there’s room for improvement here in the way of more options. Check out Memmy for what I’m talking about - lots of options for how and when posts are marked as read, and the supreme feature in this space the ability to selectively hide posts based on what “list” you’re looking at - All, vs the actual community.