https://wccftech.com/amd-fsr-support-now-integrated-into-epics-unreal-engine/

Support for AMD FSR (FidelityFX Super Resolution) is now available directly in Epic's Unreal Engine thanks to a newly released plugin. Do note that Unreal Engine 4 version 4.27.1 is required to use it.

After the fairly simple installation, game developers will have the following options at their disposal: