42PG20D: XBOX ONE X +LG: does not recognize HDR

Do you have the "HDMI ULTRA HD Deep Color" enabled for the HDMI port?

Picture > Additional Settings

Have you color synced rhe tv correctly?

Have you setup your tv on your xbox one x ? I use s samsung mu6100 4k tv and it detects it fine except for my ps4 pro

Also are you using s 4k cable on the xbox

Gold plated and must be hdmi 1.4 suggested 2.0

Not all cables are created equal

Ksep in mind 4k could be limited to certain slots please refer to your tv manual

Keep in mind when you change ports or cables you MUST run the tv setup wizard each time.to detect new settings if you want hdr supported

If thebprevious cable doesnt support l4k

Did you turn on enhanced in the Denon for the 4k signal format? I assume so since your other devices are showing Dolby Vision but just want to check as the bit depth that may be getting sent without enhanced on in the Denon would be 8bit and would still
pass DV without enhanced on.

Have you tried Enable YCC 4:2:2 on the Xbox?

Have you enabled HDR within the settings of your TV also some TVs Only Support HDR in HDMI 1 so it might be worth a look.

Yes! My TV supports HDR in all HDMI

You need to check some LG models only do HDR and 4k in a separate HDMI and you must have 4k cables