Upscaling seems to be pointless in Black Ops 6 right now, so maybe hold off on turning on DLSS/FSR/XESS
If you’re hoping to rely on upscaling to make Black Ops 6 run better on your PC, you may want to reconsider.
Source: https://www.vg247.com/call-of-duty-black-ops-6-upscaling-pc-dlss-xess-fsr-broken