Yes, during AutoPark the center screen will show you a continuous diagram of where the car believes it is, in relationship to the parking spot. The instrument cluster shows you a parking sensor diagram much like when you're backing in yourself. The only thing suppressed is the "beeping" noise from the parking sensors. You can hit the brakes or touch the steering wheel at any time to pause the maneuver. You can either resume or abort from there.
During a Summon, the hazard lights will flash and you do hear the parking sensor sounds (they permeate from the cabin). But Summon moves in a straight line forward and backwards, so it's insanely obvious whether or not it's doing anything. You'll also get push notifications from the phone app (if you configured them) for summon started, summon stopped, and summon aborted.