According to the comments this cable supports VRR:

https://www.amazon.co.uk/dp/B094XR43M5/

Official site: https://www.cablematters.com/pc-1398-154-cable-matters-8k-di...

I have it, it does not. Well, it may. It depends on the firmware you install on the cable. Depending on the firmware, different things will be broken. I tried them all. There's no version that will consistently support 2160p@120 and 4:4:4/RGB and HDR and VRR, and without random handshake issues.