I would be shocked if Russia did, the west has been pretty limited with allowing Ukrainian strikes with western systems on Russia even to this day. Like it or not I don’t think they would attempt to strike another country because they are scared of relatiation.

I would be happy to be wrong, because if they do I think the west would join the war or allow Ukraine more Freedom with their systems. Either way the net outcome is Russians still loosing the long game, like they currently are