Quibbling over definitions of genocide is pissartistry.
The Kremlin have said that Ukraine as an entity has no right to exist and it has provably targettting civilians and deported tens of thousands.
UN definition of genocide, taken from www.un.org/en/genocideprevention/genocide.shtml
In the present Convention, genocide means any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such:
Killing members of the group;
Causing serious bodily or mental harm to members of the group;
Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part;
Imposing measures intended to prevent births within the group;
Forcibly transferring children of the group to another group
Note that the definition says 'any' of these, not 'all'.
items 1,2,3 and 5 are happening.
At this point it becomes clear that the UN does not -want- to call it genocide because then, goodness me, they'd have to do something. But as RTB says, that would mean having to reach an agreement.