LOL. That means XS and AMD RDNA 2 include VRS-specific hardware in their circuitry just like Nvidia does in its own architecture. It's easy to understand
The VRS option is not compatible with Nvidia pre 2000 or pre RDNA 2 GPUs. Since enabling it may result in no performance gain or even loss. That is, you can do it on PS5 without specific hardware and the result will be the same as for these no compatible PC Gpus. And that's why you have multiplatform games in a certain amount that use VRS on XS and PC and it's absent on the PS5 version.
From here, following the discussion is wasted time because it is very easy to understand with a minimum of knowledge and information.
OK, the option is present only for props, right?