Poker in Russia has to be affected somewhat with different sites and payment systems becoming unavailable due to various private businesses pulling out. I am sure that there are players there that don't want anything to do with this war and it sucks that they are going to get caught up in the mess.
I don't know how prevalent poker players are in Ukraine, but surely they have other things to worry about right now so it would make sense that their numbers would be down as well.
Here's to peace sooner rather than later.