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.