How would abortion laws change when Harris becomes president? what power does the potus have to change it?

My understanding is that when Trump was president he was able to nominate 3 people to scotus and that affected roe v wade. When Harris becomes president she can nominate to scotus. As potus can she do anything else?
Updates
1 y
Thank you everyone for the answers. Sounds like abortion isn’t a reason to vote for president this year because who ever wins can’t affect the law.
How would abortion laws change when Harris becomes president? what power does the potus have to change it?
Post Opinion