Facebook’s explanation is gibberish and does not explain why they deleted her account, since restored.

Instagram “incorrectly” and temporarily deleted an account belonging to the mother of Lance Cpl. Kareem Nikoui, one of the 13 U.S. service members killed in Afghanistan last week.

Source: Instagram ‘incorrectly’ deleted account of mother of fallen service member Kareem Nikoui

She had been critical of President Biden’s handling of the Afghanistan withdrawal and some think this is why her account may have been targeted for deletion.

This seems to happen a lot with social media platforms.