How can I get fsr4 working with a rdna 3 gpu (rx7600) on cachy os?

I have tried manually installing optiscaler, but the moment I select fsr3.x, it rolls back to fsr 2. I then removed optiscaler and tried to fiddle with env variables, but no matter what I do, it never seems to work. Is this possible in the first place? I was able use fsr 4 easily on w11. I am willing to do anything except go back to windows.