I think parent is referring to that Türkiye is now the requested English term. https://www.trtworld.com/turkey/turkey-to-use-t%C3%BCrkiye-i...
The suffix -iye, however, is also a suffix that is used in Turkish coined words of Persian and Arabic compounds where it means -ness or -ity: https://en.m.wiktionary.org/wiki/یت#Ottoman_Turkish
There is kurabiye (gulabiye = gulab (rosewater) + -iye), and later coins such as cumhuriyet (cumhur (general public) + -iyet).
Türkiye is not such a coinage. In Ottoman Turkish Türkiye would mean Turkness.