She wouldn't be from krypton, that's where people seem to be making the mistake. The ancestry would be. Just because your roots can be traced to a region does not make you from that region. You are from whatever you are born but have ties to your heritage. And since it would be millennia since that ship arrived the bloodline would be diluted down enough that she wouldn't have the same powers anyways. Also in the tie in comic book the person that left the pod was Kara Zor el. His cousin, if they explore that or not remains to be seen.