https://www.joblo.com/yellowjackets-bonus-episode-confirmed/#:~:text=Yellowjackets%20fans%20believed%20that%20the,release%20of%20the%20third%20season.

Yellowjackets fans believed that the bonus episode would drop today. That didn't happen, but series co-creator Ashley Lyle took to Twitter to confirm that the episode does exist. She didn't offer an update on when fans might see the episode, only that it will premiere sometime before the release of the third season.