The US State Department has already adopted the new spelling, so you're wrong.
https://www.npr.org/2023/01/08/1147704945/the-state-departme...
It's silly to think things don't change and rude to call people names they don't want to be called
It's silly to think things don't change and rude to call people names they don't want to be called
https://en.wikipedia.org/wiki/Turkey
And even then all major US publications use Turkey:
https://www.wsj.com/articles/powerful-earthquake-strikes-tur...
https://www.nytimes.com/live/2023/02/05/world/turkey-earthqu...
https://www.cnn.com/middleeast/live-news/turkey-earthquake-l...
https://www.foxnews.com/world/people-dead-turkey-syria-after...
So no, even in the US, "Türkiye" is not used. Please don't try to dictate to Americans and other first language speakers how our language is used.
Why would common usage matter for something that recently changed? Of course the former name is more commonly used. The State Department is the better source since they’re the ones dictating how the US government as a whole interacts with Türkiye.
It doesn’t matter what the people in the US call countries if we’re not the ones making deals and talking to their leaders. I can convince everyone that Russia would be call Assuria but that doesn’t make it’s name. The only ones that have authority of the name of a country is the country itself.
The only authority on the English language is popular usage.