@k4r4b3y I talked to pokkst yesterday and he said he didn't find any instances (besides mitra.social) that can federate with his new Tor instance.
He's almost right, unfortunately. There is only a dozen of Tor-only servers and the same number of clearnet servers with Tor connectivity, not much people to talk to. The situation would be better if monero.town were connected, but Lemmy doesn't work with Tor.
One way out of this is talking to instance admins and convincing them to enable Tor federation. Another way is building a bridge. That shouldn't be very difficult but somebody needs to do it.
Other solutions require extending the protocol, this is doable and I'm working on it, but this is not going to happen soon.