Don't know if that vehicle has it but maybe a SNAFU of the interlock cable system between the ignition/shifter/brake pedal?

Usually there is some small disguised opening in or around the shifter with a cover that can be popped off and a screwdriver or some similar tool can be reached down to physically override that interlock and allow the shifter to be moved even when the battery is dead or out. This is how a tow guy gets a vehicle out of park when the electric system is dead or not functioning.

If you've got the owner's manual it should say something about that feature if one is available on the vehicle.