Official Dolby Atmos Update from Dev Team?

Try see if you find some answer in Dolby Atmos Support Page Dolby Atmos Official page

If the game does not support Dolby Atmos, then the audio is normal stereo. Microsoft are working on updating Dolby Atmos, where if the game does not support Dolby, the audio will be converted to simulate Dolby Atmos.

I have dolby support - and dolby access. It works perfectly wirh netflix, atmos games, you tube etc, its purely thr UHD player ane or does not support dolby atmos. Needs an update from microsoft

Same here, everytime I select Dolby Atmos from the dropdown menu in the settings it tells me to download Dolby Atmos... eventhough I access the settings via the Atmos App.

Update: I restarted my console and went through the setup again and it worked. Logged on just now and the headset format is still set to Dolby Atmos for Headphones. Fingers crossed...

Do you have Dolby Atmos enabled in your Sound Settings? Have you downloaded the Dolby Atmos App from the Microsoft store and collaborated everything? I'm running Atmos currently set up as you described and I get Atmos when available so it isn't an update
issue. There was an issue with HDR but that was fixed with an update a little while ago.