I used to say “Welcome to Lemmy” to new joiners, but nowadays quite a few of them join Piefed instance, having a generic term is easier
You can’t follow Mastodon users from Lemmy or Piefed, using “Fedivers” seems too generic
Previous post on the same topic: https://lemmy.zip/post/33451610
Lemmy and Mastodon can interact (yay federation!) but you can’t follow microblog users from Lemmy.
Up until recently, communities couldn’t follow other communities, because it’s just not a “thing” Lemmy or Piefed do. Users follow communities, yeah?
Except NodeBB tries to have communities follow communities. :)