If Entry Revival (Mulligans) is not currently enabled for your Survivor self-managed contest, you’ll first need to enable the feature. Go to Contest Settings > Lives & Revivals and enable Entry Revival.
Once Entry Revival is enabled, you can revive an eliminated member by going to:
Entrants Manager > Select the Member > Locate their eliminated entry > Select the option to revive the entry.
Once completed, the member’s entry will be revived and they can continue participating in the contest.