It looks like it works on Lemmy, across Lemmy instances, but not on Kbin in either direction. I don’t have a Lemmy account except a couple of bot accounts on feddit.uk. When this is fixed, or there’s an app which works for both Kbin and Lemmy (I’ve signed up to test one) and notifies me, I’ll be more open to running communities on Lemmy. Maybe it can be moved later.