No QMK specific community that I’m aware of either, but in addition to this one there’s also mechanicalkeyboards@lemmy.ml but it’s pretty quiet over there.

Here is a pretty good place to try, and as mentioned !mechanicalkeyboards@lemmy.ml is the closest thing to a viable normies’ mk keyboard community on Lemmy. Most of the reddit-hating graybeards in the mk community were already on geekhack, with a small contingent on keebtalk (I joined both! My beard is already turning grayer!), and then between Discord people, people who don’t give a shit about APIs or IPOs, and people who need /r/mechmarket to fund their hobby, there just hasn’t been the critical mass of users migrating.

This is the only place I’m aware of, but I’ve hardly done a thorough search. There are some fediverse/lemmy community search tools out there you could probably hit up. One thing that’s most likely true is that there’s no official QMK community on Lemmy.