This article explains how to make someone an admin of a Facebook group, how to make someone a moderator, and what the difference is between the two roles.
How do I add an admin to a Facebook group? [In 2024]
An admin has the most power in a group. Among other responsibilities, they can add and remove admins and moderators and approve or reject membership requests.
Click Groups in the left menu. If you don't see Groups, click Show More.
Click on Members in the menu on the left.