She got it back after the NY Times reached out to FB/Meta:
On Dec. 2, a month after Ms. Baumann first appealed to Instagram to restore her account, The New York Times contacted Meta to ask why it had been shut down. An Instagram spokesman said that the account had been “incorrectly removed for impersonation” and would be restored. “We’re sorry this error occurred,” he wrote.
Two days later, the account was back online.