Seconding this. I made major use of multireddits in Sync for reddit and would love something similar for Lemmy if possible.

Getting all of my 'aww' stuff in one place is the thing I miss most about the old place anyway.

Yes, please do this!

I would love to have this too. Big and active communities drown the less active ones and I would like to have different groups of topics to be able to not miss those less frequent posts.

I believe Summit is the only of the myriad of apps to feature this.