That already tipped the hat to the Continuity of Government and Operations. Aka validation.

The LAST EO on the Federal Register for "Biden" is the PARTIAL revocation of this EO...

On January 19, 2025. The LAST full day of a presidency. 

You cannot revoke something that had not been invoked. So, why was "Biden" partially revoking a Continuity of Government on the LAST day of "his presidency" and not January 20, 2021?