-No! Has she got the I-485 approval notice yet? If yes, she needs to bring the passport and the I-485 approval to the local USCIS Office to get the I-551 stamp (green card stamp), and use the stamp to travel. If not getting the I-485 approval notice yet, she has to use the advance parole (AP) to travel. She may go to the local USCIS Office to get the emergency AP if she does not have it in hand now.
She cannot leave US without the I-551 stamp or AP.