If AMD did anything like that, they would destroy their relationship with Sony. No company should depend on just one large customer....
But continue to fantasise.
I dont think this is likely just like Navi being exclusive to Sony isn't likely but if AMD were to do something like this I think Microsoft would be a prime candidate. Why? MS has the patents in the PC space, resources and leverage with DirectX to help them compete with their main competitors Nvidia and Intel. If MS helped them develop their Ray Tracing solution in addition other features due to MS's R&D I could absolutely see MS saying hey this has to be exclusive to us in the console space but feel free to use it in your PC GPUs. Despite what you may think AMD doesn't really make that much from these console contracts. Sony couldn't get mad knowing these are essentially MS developed technologies. Just like PlayStation's potentially custom form of Ray Tracing. It is what it is.