2019 XT4 Sport parking assistance doesn’t work anymore

We had a 2019 XT4 Sport in the garage and when we got it back, the parking assistance (beeping) doesn’t work anymore. After turning engine on and activate the P tab on the instrumental board, the light comes on for a second and the instrument screen says Park Assist off.
Does anybody have a clue on how to turn that on? Might there be a camera damaged, would it have to do with a side mirror?
Thank you in advance for your help and kind regards, Peter Schalow