I have just bought myself a Chuwi Vi8 Plus which is only running Win 10 and not Android which I have successfully upgraded to Win 10 Pro using a standard Win 10 x86 iso and not a ROM, however there is a process which you have to follow to make the upgrade work. So I hope this answers your question.
I am certain Pro would be supported, but don’t know if the key that comes with the tablet will work for Pro. If there was a ROM with an embedded key that would make life far simpler.