Keyless, electric tailgate, complete

Hello everyone we have a C4 GP with keyless and electric tailgate. Now my question: If I shut off the vehicle after leaving and then open the tailgate and then let it drive again, the whole vehicle is again “open” and not locked. Can you set this somewhere that if the vehicle has been closed and you open the tailgate and close again, not the kmplt. vehicle is unlocked and “unlocked” there? My expectation would be e that when I have finished the vehicle, I can open the tailgate alone and close it without the passenger compartment being unlocked and the tailgate is locked again. Thank you for your feedback LG Stefan