Also correlation is not causation. Generally eastern countries of former Soviet Union are poorer than western ones. EVs are more expensive than traditional cars, so obviously fewer people can afford.
Another reason is politics. At least in Poland, there are no subsidies for EVs. EVs need to compete directly with ICE cars, but it is hard to do so when they are 30% more expensive. You need to really drive a lot to get back 30% in gasoline savings.