Federation is broken.
It's been broken for days - and that's not to say for months, because I charitably include the few hours it worked again lately for some reason.
I don't know if other instances are that thoroughly broken, because the rest of Lemmy seems to be chugging along just fine. It's just us poor SDF user suckers.
And no-one gives a rat's ass.
Truly pathetic...
It is, rebooting a service/system/server or other tinkering by the instance admins has let at least one instance come back. But the bug comes back so it's not a real solution. The instances that don't show the problem might still have it but also have a solution watching to reset when needed.