Oh man. Russia and the USA obviously agreed that border between Catholic world (read EU) and Slavic world
What a load of nonsense.
r*SSia's illegal and unprovoked invasion of Ukraine is nothing to do with any non-existent 'slavic world'. It is about Putler's imperialistic fantasies.
Nor is it for the Disunited States of America to agree anything about borders other than their own (with the other party's consent).
So far, the Yank negotiations have gone precisely nowhere (no surprises if you let a 6 times bankrupt rapist try to make 'deals') and after three years, the r*SSian 'special operation still hasn't taken
Kyiv.
And Kosovo is a country, no matter what weird Balkan trolls may pretend.