"Tap to cancel" - I have had that a few times. It is very explicitly illegal in my country, with harsh penalties if caught. So yeah, Google, perhaps stop asking us to break the law?
Maps is a much larger application than people usually realize. Most re-routings require explicit confirmation, but some do not. Some are automatic (e.g. road closure) and simply give a chime to notify the user that the change has happened, and still others are opt out (e.g. large time savings on another route can be opt out).