It isn’t like that at Wawa. The reason they don’t take your food order from the gas station screen is because presumably they would have to serve you at the gas pump, which is not something they will do. You can just use the app to order if you want.

They also won’t bring your online/app order to the gas pump, you have to be parked in a regular spot.

There’s also the concern of updating the menu on the gas pump which (for Wawa) is a non-trivial problem.