Have a look at the PostmarketOS device list. There are a ton of devices that boot, but the vast majority are missing critical features that render the device almost useless for anything but a server. The only android phones that I know of that run well with usable features and performance are the Oneplus 6/6T, Poco f1, Pixel 3a, shift6mq and fairphone, though even then there are crucial features missing. A modern phone built for Linux with a modern chipset, working camera, USB and sound would be awesome, but such a device does not exist AFAIK.
That might explain why I don’t have the highest opinion of FSR. I’ve only used it in Counter Strike 2 and Godot. I’ve never tried XeSS or DLSS but thanks to your comment I just learned that XeSS can apparently run non intel GPU vendors from their github page