She can’t break the record now because she would be too old.
The ship was abandoned, too. And now she’s too old for her advertising sponsors to buy her a new one.
Her mom is pregnant with her 8th kid so they can try this stunt again in a few years with a different kid.
If she is too old to break the record it will be interesting to see if she pursues this. If it is something she really wanted to do then she will. If it is only about the record and fame then she won’t.