It might be possible to change the line in ROTJ so Padme shared the same fate as Alderaan using ANH dialogue but it probably sound wonky.

Leia says she died when she was very young (not newborn baby young but young) I don't think changing that will work.

It's doubly a shame Lucas changed things for the PT really because with all the talk of Disney spin offs the story of Young Leia and the final journey of her mother would make an interesting story.

If I was a Disney executive I would have my people working on retconning that retcon to make such a film possible.

Padme's death could have been faked to help protect her and the children.

That way Nat Portman could be in a good Star Wars film with interesting female characters.

It might more interesting than young Han and bully Boba or whatever we are going to get.