Well that’s different than what you asked before but ok. The president doesn’t create new laws. That’s the job of the legislature. Currently the republicans hold more seats in the house and in the senate there’s 48 Dem, 49 Rep, and 3 Ind. So not likely to produce anything about abortion other than trying to ban it. It doesn’t look like anyone else is going to be a real contender to run in Biden’s place and anyone from the republican side would clearly be worse and would greenlight any anti-abortion bills that legislature would try to pass. So the obvious and adequate answer is that when Biden’s term is up we are going to have to vote for him again because there are no better options and the legislature is not in a state that will work to protect pro-choice rights but is in a state where it could try to limit those rights. Also, Biden was sworn in on Jan 20th 2021 so he hasn’t had 4 years yet.