It sucks, but after my Kbin instance was swapping over to Mbin (quick shoutout to tuckerm at supermeter.social, dude's fucking awesome), I decided to give Lotide a shot, and unfortunately, the instance I signed up for didn't seem to federate at all for the communities I subscribed to.
If people want a federated Reddit alternative that isn't Lemmy or Mbin, I'm on PieFed rn and it's honestly been great so far. I like that the source code is on Codeberg, which is what made me swap to Kbin from Lemmy to begin with.
There's also Brutalinks, which has their source code on SourceHut like Lotide does, but I've yet to find a live instance of it: https://git.sr.ht/mariusor/brutalinks