Well, folks can take the info I am giving based upon my experience or ignore it.
I have never, ever, ever seen a device where the motherboard was changed out reactivate on its own, nor via the troubleshooter. It is, in the eyes of the Microsoft digital license servers, a completely different machine. It's not going to activate if it believes it's already activated on another piece of hardware.
I believe there is an "uninstall" process that can be used on the old hardware that will allow this to happen for retail licenses, but that's still not "automatic" as I deem it as you must deactivate/uninstall on the original hardware first.
I gave a link to a topic where this was very recently discussed, and the suggestion to give Microsoft a call to get reactivation, if you qualify, worked like a charm.
If you don't qualify, one can purchase recycled Windows 10 Pro licenses for a song, and I've purchased six of those (so far) and all have activated without a hitch.
None of what I offer above is from a single data point, but many experiences.