Xbox Series X 4k HDR Blu-ray Disc not playing Dolby Atmos?

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?

Hi I have a Xbox series x with a Dolby vision compatible tv also will the allow Dolby vision playback selected in settings on and it still only displays in HDR only when playing 4k blu rays ? I have set it 4k 60hz and the games display in Dolby vision plus streaming apps but not 4k disc playback! Is this correct that the xbox series can’t do this ?

Yes, 4K HDR Dolby Vision works with the Blu-Ray player and NetFlix on the Xbox One X.

I have the same problem. If I use Dolby Atmos output over HDMI there is an annoying audio delay when playing blu-ray or 4k discs. Changing the output to uncompressed 7.1 seems to fix the issue, but I would rather use Atmos. I do not have this problem with streaming, only with discs. My setup is Xbox Series X to a Marantz SR6012 via HDMI and then HDMI to a 75" TCL 6 series TV. My speaker configuration is 5.2.4.

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.