In the UK we would call it one of the following depending where you live.
Muffin
Bread roll
Barm cake
Cob
Bun
Bap
If I dared to travel 15 minutes in any direction and use the wrong word they would be sure to say do you mean X. Even though they know exactly what I mean.
Okay, well then I'm not sure what the issue is. The person is holding up a hamburger and the outside of the hamburger is the bun or the muffin or whatever.
If I took the train it would be around 2 hours to get there. I did for a while and it hurt lol.
I am lucky in that I work as a software dev for a tiny company and they’re very chill in all aspects, although I would like to WFH full time but I feel in time I’ll get that.