There is no Orthodox Vatican. While the Ecumenical Patriarch of Constantinople is first among equals Orthodox church comprises self-governing canonical areas. The majority of Orthodox patriarchates fall under either Russian, Greek or Constantinople Patriarchates. The Orthodox Patriarchate of Ukraine has fallen under Russian Patriarchate since early modern times but the Patriarchate of Kyiv existed before Muscovite Patriarchate. There has been multiple attempts to return it under Greek Patriarchate with varying success but they have been separate although not recognized by Russian Patriarchate since 2018.

And that was probably as many times as I have ever written Patriarchate on one text.

There are different patriachs in Orthodoxy. A tradition dating from the Roman empire. Our pope is basically the patriach of Italy. Now as you can imagine the patriach of Constantinopole, the capital of the empire at that time, has special status. But it's just that. In practice, each patriach rules over their geographic zone.

Quite stoned, hope this makes sense.