Surely! Here’s a small and incomplete list of things he could do, at varying levels of usefulness and ease:

An executive order legalizing abortion nationwide

Pack the Supreme Court

Move the Supreme Court justices to lower courts and replacing them

Simply ignore the Supreme Court, as several presidents have done in the past (Andrew Jackson being the most notable)

Get his fucking party in order and pass a law legalizing abortion back when he had the majority in both the house and senate

Open abortion clinics on federal land nationwide, claiming new land to do it on if there’s none available in a needed location

Threaten to drone strike Clarence Thomas

Withhold highway funds from states that ban abortion

An executive order declaring banning abortion a felony, and then arresting every politician who implemented a ban

Call for a general strike until abortion rights are re-established

Personally sanction governors of states that ban abortion, freeze their bank accounts, seize their companies, all the shit we do to foreign leaders we don’t like

Call for people in states that ban abortion to burn down their state capitols

Joe Biden is the President of the United States of America, the most powerful empire the world has ever seen. He’s not a powerless smol bean. If he actually wants something to happen, there’s a long list of ways to go about it. If something does or doesn’t happen under his watch, that is his responsibility.