Hello,
Same issue, the GPU works at 0% (I think it isn't 0%, but the GPU is under-used). I am sure because on all my games (Monster Hunter, BFV, Red Dead Redemption, Borders Land 3 etc...) the temperature of GBU reach 80 - 81 °c;
With CyberPunk, the GPU is at 60°c in Chill status. I tried...