Windows + Playing Games: (Windows Settings + Ingame HDR Toggle) 120Hz HDR 10-bit NO game mode, TV reports 3840x2160 / 120p input signal plus (HDR + UHD) OK!
With Game Mode Enabled:
Windows: 120Hz HDR 10-bit VRR on (Windows Settings), TV reports 3840x2160 / 120p input signal plus (UHD) HDR is missing
Playing Games: 120Hz HDR 10-bit VRR on (Windows Settings + Ingame HDR Toggle), TV reports 3840x2160 Freesync Preium Pro / 120p input signal plus (UHD) HDR is missing
There seems to be a bug where the TV isn't recognizing HDR in Game Mode and the picture is overy dim/dark & washed out. Some games like Call of Duty look so bad the TV + HDR calibration ingame cannot correct for the terrible picture quality. Some games like Doom Eternal + AMD driver color profile allow me to correct the colors to usable levels, but color ranges seem compressed / crushed. RGB output fares worse than YCBR4:4:4, where on RGB even Doom Eternal cannot be corrected to look good.