Dolby Atmos on 4k Blu-rays not working

Hi guys i have just bought a dolby atmos sound bar but now the 4k blu ray says no hdr device.

The picture is much worse as minus hdr but the sound is very decent.

My set up is

tv 55 sony xe90

xbox one S

sony ht xf9000 dolby atmos virtual surround bar and sub woofer

+ 4k blu ray.

all cables 2.0 hdmi.

Any ideas why now it wont play 4k blu ray in HDR?

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.

Do you have a Dolby Atmos compatible receiver, sound bar, or speaker system? If you do, have you changed the settings within 'Disc & Blu-ray settings' on your Xbox One to enable 'Let my receiver decode audio'? Currently Dolby Atmos is only supported within
the Blu-ray app for Dolby Atmos compatible Blu-Ray movies.

Keep us posted!

I agree Dolby Atmos would be great. I have been thinking about getting and Xbox One S for playing 4K Blu Ray. But at have not because it does not support this.

I have an LG oled c7 and watch netflix trough webOs .

By doing it this way you should get Dolby Vision and Dolby Atmos.

Microsoft will roll out an sofware update for netflix Dolby Vision shortly.

For the moment Dolby Vision is not supported on the Netflix app via Xbox.

I hope they also update the blu ray player shortly because there is much more content available on 4k uhd blu ray.