i’ll admit it’s been a while since i’ve watched the films, but it was probably a bit more obvious with Luke, right? he wasn’t exactly hidden. he had vader’s last name and lived with vader’s family on vader’s home planet.
meanwhile leia was adopted by some rando and had her name changed to match. she probably didn’t even know she was adopted.
anyway, i will have to rewatch the OT with this in mind at some point.