Modlog, which includes a site ban—something only admins can do.
The community bans also include communities that aren’t moderated by any instance admins, and some that are only moderated by a single person who likely isn’t aware of actions taken under their community’s name.
Home bans federate everywhere.
Remote bans don’t, which makes sense, because otherwise lemmygrad could ban your sjw account which makes no sense.
That’s kinda how they go to the workaround of banning from every community in that instance.
But then .world is still running an old version that doesn’t do that anyway