Does anyone have any idea why she whines and how to stop it?

It’s always in the car on the way to walks, usually when we’re stopped at a traffic light. She also does it if we go through a drive thru.

We’ve tried telling her off, makes her whine more. Telling her it’ll be okay and to shush which doesn’t really help. We’ve tried distracting with food which hasn’t helped, telling her she’s good when she’s quiet.