We did not do it with “Türkiye”. Also note that ü is a different letter from u, not just a u with decoration.

The Turkish government requested international organizations to refer to Turkey that way:

In May 2022, the Turkish government requested the United Nations and other international organizations to use Türkiye officially in English.

https://en.wikipedia.org/wiki/Turkey

Everyone else continues to call it Turkey, especially newspapers. It’s why the Wikipedia article continues to be called “Turkey”. Neither me nor you are a country or international organization.

Same with Ivory Coast and its official name “Côte d’Ivoire”.