On the Pilot panel (the screen in the middle of the car between you and the passenger, tap on the bottom right corner button (P). Take a pic and show it to us here. You should see the autopark button on the top of the screen to the right in that mode.
Actually, that leads me to a question. For anyone who is not using the DDPro trial, what does the screen look like when there's no 360 view? Does only the AutoPark tab exist in that case?