I've watched two short interviews of Biden before becoming president, and his immigration policies are basically: Undo what Trump did.
Regardless of what political side you align with, borders are necessary so that people from abroad can be verified if he/she is eligible to enter the country. In a sense, your country is your home, so a border is a door in itself and if that door is removed, then anyone could theoretically enter.
Also, I read that the amount of questions to have the U.S. citizenship increased from 10 to 20 and I agree with that. People should know the country's history if they want to join.
Lastly, let's see what Biden does so if he sticks to his word then you know he's a man of his word, for whatever that's worth.