Why Then does, (NHTSA), list:
88T4Z-78264H27-A Edge/MKX Front Latch, Left Side 1
8T4Z-78264A26-B Edge/MKX Front Latch, Right Side 1
8T4Z-7826413-C Edge/MKX Rear Latch, Left Side 1
8T4Z-7826412-C Edge/MKX Rear Latch, Right Si
Replacement for door ajar?
I would call the concierge and question this, if not satisfied, then contact NHTSA and have "them" explain why the dealer won't replace the part needed.
Best wishes