On the infotainment go into car mode (picture of end of car)
From memory, click on settings, then scroll down
Something like convenience settings
Then there is a unlock all doors option.
Incidentally if the car is new, worth scrolling and clicking into each row and checking all the settings, mine came with safety assist braking turned off (which in my opinion was wrong default)
With Kessy, can just touch the pad on outside of door handle to lock (or use the button)