Hexerei is now on 1.20.1, so could the compat datapack be updated / marked compatible?

Only when they are able to fix this bug:
JoeFoxe/Hexerei-1.19#89

It is a severe enough issue that I can't mark datapack as compatible at this time to prevent players from adding Hexeri and getting deadlocked worlds and have no idea why. Since worldgen deadlocks are extremely hard for players to debug

When hexerei v0.4.2 update is out, then put on the newly released updated datapacks. Should be good as verified their new jar will fix issue

👍