The Ninth Circuit has held that a vacatur of a criminal conviction after a petitioner has been physically removed from the United States does not demonstrate a gross miscarriage of justice in the underlying removal proceedings, such that he can challenge the reinstatement of a removal order premised on the vacated conviction. The gross miscarriage of justice standard looks at whether the removal order was valid at the time it was issued and at the time it was executed. Thus, any post-execution developments, such as vacatur of the conviction that formed the basis of the removal order, do not establish a gross miscarriage of justice. The court further noted that the petition was found deportable for having entered the United States without inspection, which provided a separate basis from the conviction for deporting him.
The full text of Lopez Vazquez v. Garland can be found here:
https://cdn.ca9.uscourts.gov/datastore/opinions/2021/11/12/18-70329.pdf