Difficult for me to determine if it's TVOS or the apps, as all the Atmos enabled apps I have, Netflix, Disney+, Plex, etc., seem to have their own updates along with TVOS. Most are stuck in 2.0 land, except AppleTV+, which is now outputting 7.1, instead of Atmos. Odd! Atmos badging has disappeared from all but AppleTV+; maybe pointing towards an OS level issue... 14.2beta, to be clear.