What exactly did Biden do to "escalate" the situation ?
Be specific. This is sounding like all the "US disinformation/false flag incoming/WW3" shit that people like you were spouting off about as little as 24 hours ago, days after Russia had already stated their intention to invade Ukraine proper after recognizing the separatists, all the while Biden kept insisting the US wouldn't get involved militarily and European leaders were practically willing to blow Putin if stood down.
As far as I'm concerned the reason Russia has seized Ukrainian territory under Obama & Biden but not Trump is because they felt safe enough to do it with them in power, certainly not because they would "escalate" the situation, but because Trump would.