I have a 2021 Chevy Malibu, and recently, it started beeping every time I was idle and in the park.
Additionally, my tire pressure indicator shows low air, but I have checked it twice today, and it’s at the recommended psi. There is no air leak in the tire.
The beeping sound is used to inform you of tyre pressure. I would take it to the dealership and check if a tpms relearn resolved the issue. It could be a malfunctioning tyre pressure sensor, or it was not properly learnt.
Also, make sure to check all of the tyres. When tyres are moved, the majority of the system locations must be reset.