See pypa/pip#8649.

Basically, cpython_tags is using distutils.get_platform here. It should probably be using get_host_platform - as far as I can tell the only difference is for cross-compilation, and (even if we accept that distutils supports cross-compilation, which I'm not sure it does) when installing wheels, we want to use the host platform, not the target platform (as we're not even building, so "target" makes no sense).