Spatial Audio on Windows 11 in my experience with the EA Shop Phantom Edition doesn't work properly or as intended. If I select Spatial Audio the game says something about being incompatible/unsuppo...
Firstly you cannot use 24 bit 96000 Hz I have to use 24 bit 48000 Hz for the output format.
Secondly you have to go to your audio device in Settings and then set "Audio Enhancements" to "Device Default Effects", if that if set to "Off", Spatial 3D will not work in BF6 and revert to 3D Headphones.
I'm not sure why any of this is the case but I've never had to be this precise to get Atmos and DTS:X working in a game before. It's like picking a lock after 100 hours of multiplayer to finally unlock the ability to hear things properly.