

I don’t think the official Reddit app has ever supported this, unless it’s a new feature?
Only 3rd party apps supported this, but a lot of those have been killed off. You might still be able to access this feature through old.Reddit:
https://www.reveddit.com/v/NoStupidQuestions/comments/9t50jp/what_is_a_multireddit_how_do_i_access/
I’ve tested PieFed out for a bit, and I like what they have going on. It uses ActivityPub, just like Mastadon or Lemmy. It’s mostly similar to Lemmy, but it has some additional features that are awesome: