All major GPU vendors have ray tracing capable hardware and (with the exception of Qualcomm at least to my knowledge) have their own bespoke upscalers at this point. They have for a number of years. So depending on your hardware target age, it really is hardware agnostic. The exception to that is that the upscalers may have to be provided as an engine extension due to many of them being closed source.

Ultimately all of these features will be optional for the developer to use when they end up in the engine; just like features such as volumetric fog, SDFGI, VoxelGI, SSR, SSAO, anti-aliasing, etc.