Beehaw is on an older version of Lemmy that is no longer compatible with most apps. Sync works, which is what I use. I'm not sure what else is an option.
I've been using Boost for Lemmy. While it is unfortunately only available in the Google Play store, it still has served me pretty well. I had previously used a different version of Boost back when it supported Reddit, but uhhh, we all know how that went. (Fuck Spez)