I wonder if someone tried to program the Regals with a Chevrolet remote. In my opinion, the Chevrolet fob has a slicker design and a more logical button layout. Both fobs have the same model numbers etc.
Buick Enclave/Encore/Regal 2018-2021 5-Btn SK w/Hatch (HYQ4EA)—BRK
Model: 4EA
FCC ID...