Dolby Vision not working at all and I don't know why. I have a capable TV to support it. I turned off 120hz and still no Dolby Vision. : r/xboxinsiders
TV 75" QNED miniLED LG 75QNED87 - 4K UHD, 120Hz, Dolby Vision IQ et Dolby Atmos 5.1.2, HDMI 2.0 & 2.1 – Dealabs.com
No 120Hz Dolby Vision gaming on Xbox? LG, Sony & Panasonic respond - FlatpanelsHD