I admit I am speaking from a position of ignorance, but my take from Robert’s comment here Hyper-Q technology is that all hardware since 3.5 has hardware features for MPS use.
Edit: I see your point re the extra MPS hardware features for Volta and Turing, but looking at the Turing arch doc https://developer.nvidia.com/blog/nvidia-turing-architecture-in-depth/, this only applies to the Tesla versions, so perhaps this is just a Tesla (Quadro?) extra?