Pay at the pump is nearly universal in the US. The last time I encountered a station that didn't have it was ca. 2001 in rural Arkansas.

Pull up, insert card, insert filling handle, start, lock on, step to the side to avoid fumes, when it clicks off you put up handle, put gas cap on, drive away.

Electric cars have a lot of pluses, but refilling the tank as quickly as gasoline or diesel isn't one of them. I can drive at highway speeds for over thirteen hours on two refills of the tank, each of which takes less time than walking in and using the restroom.