The contact owns a 2021 Jeep Grand Cherokee L. The vehicle was included in NHTSA Campaign Number: 24V436000 (Back Over Prevention); and was taken to the dealer to update the radio software. The contact stated that after the recall repair was performed, the Forward Collision Avoidance activation button was no longer displayed on the infotainment center. The Forward Collision Avoidance Off warning light was illuminated on the instrument panel. The contact informed the dealer, who was unable to determine the cause of the failure. The dealer advised the contact to wait for a day; however, the failure persisted after the system reset. The manufacturer was not informed of the failure. The failure mileage was 18,000.