Edit:
Official Lemmy Community:
https://lemmy.world/c/syncforlemmy
This should open the community in your instance
Looks like the Boost for Reddit Dev just reserved a Lemmy Community…No official announcement yet.
Proof: https://old.reddit.com/r/BoostForReddit/comments/14ehiqs/_/jouvuok/
Direct Link to the Community: https://lemmy.world/c/boostforlemmy
It’s an app that lets you view and comment on lemmy (previously Reddit) on android with a very smooth and versatile interface. Lots of great tools for customisation and feeds.
You should be able to group communities together and hide already read posts. Lots of theming and other things as well.