Things like text search and exact string matching.
As minor as it might sound, if 199/200 countries work in your system, capitalism dictates that below a certain business size, the logical thing is often to just ignore the one country and move on.
I have good news for you - text search for non-ascii version of latin characters like ü is a long solved problem. That's because even in non-english speaking countries some people don't bother with diacritics, or they don't have a correct layout at that point, or the text is in source code and has to be ASCII, etc.
You can try that now - my browser highlights Türkiye when I search for Turkiye.
As minor as it might sound, if 199/200 countries work in your system, capitalism dictates that below a certain business size, the logical thing is often to just ignore the one country and move on.
These things have odd cascading effects.