The Ninth Circuit has determined that the agency lacks any sua sponte authority to reopen a reinstated removal order, even if a petitioner is alleging a gross miscarriage of justice.
The full text of Bravo-Bravo v. Garland can be found here:
https://cdn.ca9.uscourts.gov/datastore/opinions/2022/07/18/20-71042.pdf
An amended opinion can be found here:
https://cdn.ca9.uscourts.gov/datastore/opinions/2022/12/02/20-71042.pdf