Yep, thread based communities are shared perfectly between Lemmy and kbin. Other than currently the largest kbin community is having federation issues due to the influx of users
@TheOneCurly I've been noticing massive #Kbin federation issues, even from the small instance that I'm on, kbin.projectsegfau.lt
Agreed, Fedia.io was mostly working this morning but at some point federation just stalled.