Ukrainian poker players are of a very good level. I have met them many times and learned a lot for myself in tactics. Your esteemed General Zaluzhny is acting in approximately the same spirit. Glory to Ukraine!
I think that the Ukrainian school of poker is pretty strong, there are many Ukrainian poker players who participate in top tournaments and take excellent places in the finals, and these are not isolated cases, there are quite a lot of them.
I can only judge by freerolls. The main strength is that there are a lot of Ukrainian players, it happens that there are four Ukrainians at a table of nine, apparently poker is very popular there.