In a Biden administration the US-China tensions will remain on the agenda. The US has the domestic challenge of inequality in income and wealth, while it could be described as a type of nationalism, it has to remain as one of the main focuses in either administration. A Biden administration would see the US rejoin the Paris Agreement to coordinate globally climate change.
We should see a much less aggressive approach to international relations and more support of multi-lateral cooperation on complicated matters such as the digital technology era: data security and storage issues, internet content and so on. I think a Biden victory would mean a more constructive approach to international relations when it really matters.