Kezo, I take it that box would need to be installed by the company fitting the charger?
No! you could fit the box to the wall with 4 fixings and tell the installer, you want the charger fitting in there or you could politely ask then in return for a cuppa on the day.
when charging, you can can use a bungee attached to the inside of door and back of the box, so it looks as if the lid is closed by passers by or you cut cut a small “U” or “V” at the front of the box, enough for the charger cable to pass through, and beable to lock the door.