It’s a mix. I see the same thing as you, but I’ve also seen some stuff on some Lemmy instances while hopping outside of Kbin that hasn’t propagated. Federating is difficult, it seems. It’s also hard sometimes to recognize where the post you’re replying to really came from, as the link is a Kbin copy. I think there’s some URL highlighting addons I haven’t looked into yet. Not that it matters to me, as long as my stuff gets out there eventually.