Basically GSR is an open source implementation and works pretty well for Snapdragon devices with Adreno gpu. The upscaling tech will help reduce the gpu overhead.. And in small screen will be benefital i guess. Add an option to turn it off too.

 https://github.com/SnapdragonStudios/snapdragon-game-plugins-for-unreal-engine?tab=readme-ov-file 

The detailed documentation can be found here. And it can be easily added as a plugin in Unreal engine. Do consider adding support for this for Snapdragon devices.. Please.....