FSR Ultra is native. I use that, but drop screen res from 4k to 1440 as it looks better and get higher FPS than 4k with FSR high.
Sharpness does work with FSR, but 100% for FSR just does not do that much sharpening and that is as high as it allows.
Shadow quality high is using contact shadows, which is not cheap, but fixes light leaks on players and through blocks.
SSAO is now using 3rd party code and I don't know if it can run faster, but still look fine.
Gfx jobs crashed on some people's computers the last time we enabled it, so we are not yet supporting it.