There’s !meta@lemmy.ml, but it’s not really a hangout joint. It’s more for housekeeping.

lemmy.ml doesn’t really have a main-like community. For better or worse, I don’t think lemmy.ml really has an overarching sense of community like say hexbear or lemmygrad do. It’s more “general purpose.”

A community of privacy and FOSS enthusiasts, run by Lemmy’s developers
What is lemmy.ml

BTW, !asklemmy@lemmy.ml rule #3:

Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below