@“Cardinal Fang”
Minor quibble – the father’s citizenship status at the time of her birth isn’t relevant – the key point is his diplomatic status. And that’s unclear because while his employment as a diplomat had ceased, it’s not clear at what point his lawful presence in the US shifted from diplomat to some other status (refugee? asylum seeker? visitor? – even that’s unclear, as his shift in status was due to civil unrest in his home country).
I agree with @twoinanddone that she apparently has not exhausted administrative remedies — and it’s not clear from the news coverage that I’ve seen if she has even made an application on her own at this time. Her father has filed a lawsuit – but it doesn’t seem like she is a party to that lawsuit – so I’m not certain at all where the father gets standing.
This WaPo article adds another wrinkle:
If in fact the mother was already a permanent resident (green card holder) as of the date of the daughter’s birth, then I think that would render the father’s diplomatic status, if any, moot.