Actually, it is simple, yet you have to "wander" a bit in the menus to find it.
* Go to car settings (the touch button right under the screen with the car logo)
* (you should see the "stop&start" option, "parking sensors" if you have them, "vehicle check"...)
* At the bottom, there's a tab to another page called "vehicle settings", click it
* There are a few options, in a horizontal menù: choose "Parking"
* first option "blocking of door mirror locking" --> OFF
And there you go 😉.
(btw: even though I'm Italian, I've set my car to use English, so you should be fine with the labels I've written 😄)