[einpoklum]

But is there federation between instances of this and the official signal servers?

[tptacek]

There will likely never be federation between Signal's official servers and any other servers. Signal introduces privacy features semiregularly; we all saw with Matrix how difficult that is in a highly-federated environment.

[loeg]

Well, obviously not. Official Signal does not support federation.

[godelski]

No. But iirc Molly can connect to a federated version. You just have to pick. It's one or the other