@youronlyone https://lemmy.sdf.org/c/karabin@karab.in works but https://sh.itjust.works/c/karabin@karab.in doesn't
So it's not "lemmy can't see kbin, but kbin can see lemmy", I think it's more "both apps are not mature enough, instances and new users are popping non-stop since yesterday, and the fediverse isn't super straightforward"