Yes it does look like it was banned from some other instances. You can check the mod logs for various users: https://lemmy.world/modlog?page=1&actionType=All&userId=238006
I'm going to explore if we can re-federate, but hide all of the communities so that only subscribed users can see them. I see that the admins of lemmit are not going to add any more communities, so hiding all of them should be feasible. I haven't brought this up with the other admins yet, and I don't know if users will go for it, but that seems like a compromise that the community might support.