The website will have detailed instructions. In the meantime this should give you an idea:
That’s a good idea, but out-of-scope for me. This requires to mod the game itself through the SDK (I think) in order to get this data. Also requires the GPU vendor SDK to access the driver settings (for both Nvidia and AMD). That’s more work outside of my OpenXR layer than in it. Probably a project for a Flight Simulator modder. if someone steps up to do it I am more than happy to show them how to read the upscaling settings etc. But tbh this is the only place my layer would be involved.