Not wholly, surely? As an OEM, Apple would need to provide drivers. Given that their system isn’t an off-the-shelf SBBR/ServerReady ARM64 device, that’s going to be a not-insignificant amount of work that isn’t Microsoft’s responsibility.
Seeing as the Asahi Linux project has had to reverse-engineer pretty much everything, I don’t see how Microsoft could be totally on the hook.
If you want to activate it, use slmgr with some sketchy third party KMS server.
if MSFT is serious about (eventually) transitioning to ARM for the majority of consumer-oriented Windows machines, it surely makes sense for them to provide support for the most adopted ARM-based laptop and desktop platform out there… to bolster development of ARM-native applications for Windows on ARM, if nothing else.
i don’t own either machine — but i imagine the ARM-based Surface Pro X would make a miserable development experience, especially compared to a hypothetical Windows on M1(X) MacBooks.
we shall see i suppose, but i would be very surprised if we never see it happen.