From your owner's manual:
The autounlock feature will unlock all the doors when: • the ignition is on, all the doors are closed, and your vehicle has been in motion at a speed greater than 12 mph (20 km/h); • your vehicle has then come to a stop and the ignition is switched off or to accessory; and • the driver door is opened within 10 minutes of the ignition being switched off or to accessory.
It has worked that way on all Ford vehicles for at least the last decade, maybe longer.