There's nothing special about the button itself, but there's an RFID antenna wired into the housing with it for purposes of the "dead fob emergency start" function. That antenna doesn't have any smartwork, it's driven directly by an RF circuit in the BCM and the inductance probably isn't compatible with similar buttons from other OEM's. Using the WD's I think you could probably swap it for most other N/I start buttons, but not with any old button at all. To swap it with a generic button, you might try wiring in the antenna from a late model steel-key car like a '14~'20 Rogue S or '12~'19 Versa S, those are ring antennas that circle the ignition cylinder and could probably be glued behind the button hole in the console cover. If the BCM doesn't object, then you can substitute any button you like.