I don't know, but Iceland doesn't give visas to Russians. Meaning that G2 won't have a coach when playing in Iceland. It can be quite big problem considering that nukkye just started IGLing and even said that Pipson helps him a lot.
russian people aren't banned from going to Iceland, just russian aircraft, so as long as they fly to another country and then fly from there to iceland they should be fine
last few weeks there were UFC events in London and the USA with Russian fighters, only commercial flight services to and fro are banned. So it seems so they can fly in private jet.