I can't read your language and Russian language, but my assumption you guys are more active in Russian board, correct?
That's make @theymos think no need to create Ukrainian board because Russian board is already enough.
No offence, but considering the ongoing war russia started against Ukraine, I believe it is a little bit cruel to suppose that Ukrainian speaking users would want to write in russian board, communicate with local members and be cool with that.
The fact, that most Ukrainians know russian language does not mean that they would not like to have their own board where they can communicate in their own language.