https://codeberg.org/Kbin/kbin-core
It's ActivityPub though, so it can communicate with Lemmy and others.
Are Kbin and Lemmy currently interoperable?
They obviously have very different architectures and must have been a very impossible task.
This on the hand, makes me think that if someone wants it, it can look like anything, twitter or Facebook or Reddit (which it looks like currently)?
What’s the reason for it being more inter-operable with mastadon than lemmy?
Just to clarify, it’s fully inter-operable with lemmy. But while lemmy only has basic Mastodon support, kbin has full support. I’m guessing it’s just priorities.