You can sort of remap it on windows, but it's somewhat limited in my experience. It shows up as a keyboard chord rather than a simple button press. I think it's LWin+LShift+F23. I ended up simply disabling it entirely on my gaming laptop. I've been meaning to see if it's easier to make it useful on KDE Plasma desktop but haven't yet (though I did remap the HP Omen button to pull down Yakuake instead).
I have one laptop with a Copilot key in my business. (I didn't even realize that when I bought it.) It takes the place of a modifier key, I think the menu key. Except it outputs a specific keypress (Ctrl+Shift+F23). So it can't be mapped to anything useful like a modifier key. But you can reassign the meaning of Ctrl+Shift+F23.
