Biden lied so many times in the SOTU address that this lie was unfortunately overlooked. Biden misquoted Trump to (falsely) claim that Trump would allow Putin to do whatever in the Ukraine. What Trump was jokingly alluding (blustering) to was that if the members of NATO did not pay their fair share of the expenses that the US would not have an obligation to help them. This is one of many statements that the left purposely contorts to (falsely) claim that Trump said something that he never actually said.
Moreover consider the political optics of what Biden/Harris presented to Putin. Biden implied that if Russia undertook a "minor" incursion into the Ukraine, that that would be OK. Both Biden and Harris also arrogantly taunted Putin by asserting that Putin could go pound sand if the Ukraine joined NATO. Unfortunately, Putin took Biden's challenge. Though Putin started the Ukraine conflict, Biden is responsible for encouraging a kinetic conflict since no diplomatic defusion was evidently pursued. This was a major foreign policy blunder by Biden.