//The short answer is simple: Ukrainians call their capital “Kyiv” (kee-yiv), the spelling, a transliteration of the Ukrainian Київ. The Russian version is “Kiev” (kee-yev).
The latter, based on transliteration from the Russian cyrillic Киев, became the internationally accepted name through the Soviet period and into the first years of this century, its recognisability enhanced perhaps by the eponymous chicken dish that became popular in the west in the 1970s.
But it is now associated with the Russification of Ukraine, and in recent years more and more publications, governments, airports and geographical dictionaries have switched the spelling to the Ukrainian variant.//
https://www.theguardian.com/world/2022/feb/25/how-to-pronounce-and-spell-kyiv-kiev-ukraine-and-why-it-matters
So it seems in pronouncing the name of the city, the 'kee' remains the same but the 'ev' changes to 'iv'. Not difficult.