For most Europeans, Biden’s election is like old home week. The US rejoins the Paris Agreement, starts talking to Iran again, and drops the obnoxious tariffs. The future of NATO is no longer in doubt. Virtually everyone breathes a sigh of relief.
The governments of Hungary and Poland are the exception. Biden makes it clear that he does not approve of illiberal democracy. Fortunately for them, he correctly views their situation as one primarily affecting the EU, not the US. Whether the EU finds a solution to the problem they present is the topic for a different day.