TechPowerUp posted a review on the Red Dead Redemption 2: FSR 2.0 Community Patch
A quote from the article:
Red Dead Redemption 2 recently got support for AMD's FidelityFX Super Resolution 2.0 through a community mod. The addon converts the officially supported DLSS render path into instructions the AMD FSR 2.0 algorithm understands, resulting in excellent results.Red Dead Redemption 2: FSR 2.0 Community Patch Review