wait, something I recall is that the PS5 have is own VRR or I am wrong?
I believe you are referring to VRS, which Sony apparently has its own solution for (from what I read). VRR is adaptive vsync to smooth out framerate dips. Variable Rate Shading (VRS) is a render technique designed to provide a performance boost at little (or no) image quality cost (theoretically) by "applying full GPU shading horsepower to detailed areas of the scene, and less GPU horsepower to less detailed areas."
I could be way off, I am not an expert, just going off what I read here and there. Someone slap me silly if I am wrong.