You’re simply wrong about this friend. Congress could make the Roe standard the law of the entire US tomorrow. This is why you see Biden and others asking them to do just that.
I'm dead certain Congress couldn't before Roe, between Roe and Dobbs, or after Dobbs, not w/o a Constitutional amendment. That much is quite clear. I quoted from Dobbs, and as to Roe, Roe declared a constitutional right, which means Congress couldn't do anything about it w/o a constitutional amendment. If federal statute could compete, then Congress would have made Roe law long ago in any one of the many sessions in which there were vast majorities for it in both houses and in the White House. But no, it requires an amendment, which is why it's never happened -- it's hard to get 2/3rds majorities for anything, let alone controversial things.
So you're saying you're "dead certain" that Barbara Boxer, Hillary Clinton, Dianne Feinstein, etc. misunderstand what kinds of laws are and are not constitutional? Where does such a high degree of confidence come from?