Possible solution to not working Dolby Access app

I am having the same issue, and DTS;X is not being detected either from disc either. Atmos from the Dolby Access app and the Netflix app work properly.

Did you find a solution?

Update:

I have now tried a 4K Blu-ray disk and can confirm that Dolby Atmos works with it. I used the AVR Key so HDR would go to my LG OLED TV and the Dolby Atmos Sound would go to my non-HDCP2.2 Marantz SR7009 Receiver. I now believe the problem is with the Dolby
Access App and not with the Xbox One X's operating system itself since the 4K Blu-ray would send its own Dolby Atmos track to the receiver bypassing the Dolby Access App. Where with Games and the Demo's in the Dolby Access App are using that App to process
the Dolby Atmos signal. Thus I believe it is a problem with the Dolby Access App, but i don't know how that ties into the operating system or how the Blu-ray player app integrates with the Xbox's operating system or bypasses it because of that pass-through
setting that lets the receiver process the Atmos Signal. Either way I have concluded there is nothing more I can do, it's definitely an issue with either the operating system or Dolby Access App having compatibility issues.

I contacted Netflix customer support and they provided the exact same resolution.

I uninstalled and reinstalled dolby access app and now netflix dolby atmos works.

you need to purchase the Dolby access app that contains the Atmos license, you can get a demo of it to make sure it will work for you

Thank you I’ll check out the app later. Is the headset app purchase in the Dolby app? I can’t see which to purchase and in the Dolby app they said my system Dolby atmos for home theater is ready and turned on checked .

I bought a Bluetooth 5.0 dongle. The sound works better but not flawless. Using with the dolby atmos app (dolby access) works great. But sometimes the sound starts to crackle. But with the official xbox adapter for Windows. It's unusable!