Welcome to the forums @harrmitch!
I’m not 100% positive on this, but I am fairly certain that Godot is planning to support Apple Silicon (ARM), and so I imagine it wouldn’t be too much of a stretch to also support the Windows equivalent. I think Godot already supports Linux desktop ARM platforms, so things there should be good.
For the most part, as long as Godot source can be compiled, it should run just fine on ARM. You will need to use a export template compiled for ARM, but outside of that, it should work just fine.