The standard hotdog you can find in Germany consists of a bun and sausage with ketchup, mustard, crispy onions, pickles and sometimes cole slaw.
Where would that be the “standard”?
The most common sausage in a bun combination is just sausage, bun, ketchup/mustard.
Unless you’re specifically talking about restaurants that have an item called “Hot Dog” on their menu, which in turn is rather rare.
I’m not entirely sure, what you’re advocating for.
There are Turkish supermarkets, restaurants, döner stalls, and barbers all over the place.
I also know a Turkish electrician, but I’ll go to him when I need an electrician, not when I need a Turk.
Weirdly enough, many if not most kings in history were not absolute monarchs and had to follow some rules and expectations or risk losing their power (and possibly life).
They’re not sold as ‘hot dogs’ but I’m pretty sure there isn’t a place in Germany where plain old bratwurst in a plain old bun isn’t a thing.