The volume of cryptocurrencies transactions is still small when compared to fiat, so if there is a country that 100% legalizes cryptocurrencies while the use of citizens is very small of course it will not have much impact, heavy sanctions for the Russian state of course will not have much impact because they have strong support from China and neighboring countries another russia.
But wouldn't legalization of cryptocurrencies drastically increase the volume?
Also, support from China might be rather questionable, it seems that China is still indecisive and remains rather neutral. I think they are yet to choose between the two parties. China probably did not such heavy sanctions inflicted on the Russian side.