She would need to ask an immigration attorney this question. The fact that she left legally then came back legally after 16 years old might disqualify her since she didn't stay on her initial entry of 14.
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Self filed AOS │Apps Received By USCIS - 3/18/19
│Biometrics Done - 4/11/19
Interview Scheduled - 4/24/19│Interview Date - 5/31/19│AOS Approval - 5/31/19
Permanent Resident Card Received - 6/8/19