If you are looking for a GPU version of scikit-learn, I think Nvidia is making one, and they call it cuml. Note that, not all algorithms are implemented, and there will also be some missing functions as well.

However, a note about Apple and AMD GPU thing: they are on the rise, but not until a few years later that they will become usable. My lab has only Nvidia GPUs but we already have a lot of headache dealing with Nvidia drivers and libraries. At least for a few years, we do not see any plan switching to AMD or Apple.