Just call them Kinstances or something and patch the functionality together (if possible). Merging Kbin with Lemmy 1-to-1 (sans mastodon tools) would do wonders for both communities.
@GlitchyDigiBun "kinstance" might get confusing, as magazines are not instances. I'm not really sure what you mean by "merging kbin with lemmy 1-to-1"?