You are very US centric. In my town there are one McD, one BK and one SubWay waay outside the downtown area. That is for a Norwegian town that has roughly 50k ppl in its “Metropolitan” area. I take the train home and besides some Sushi places (decent) and Kebab joints (awefull) I can choose BK or McD if I just walk in of the street toward the station
In Norway they are sold as fast food and are called rollerburger