https://wccftech.com/call-of-duty-vanguard-may-support-amds-fidelityfx-super-resolution-instead-of-nvidia-dlss/

The Call of Duty Vanguard early access beta for PC players began yesterday, allowing enterprising users to take a peek at the game's files for the first time. Earlier today, Reddit user Wolik69 found a mention of AMD's FidelityFX Super Resolution (FSR) spatial upscaling technology in the adv_options.ini file.

Call of Duty Vanguard Beta Comparison Confirms Higher Average Resolution on Xbox Series X, Better Reflections Resolution on PlayStation 5