Thread:MisterWoodhouse/@comment-44327365-20200513140802/@comment-34888194-20200513141513

You need to be a bureaucrat in order to make someone an admin. "To add or remove users from these groups, admins or bureaucrats can go to Special:UserRights. Some groups can only be added or removed by bureaucrats or Fandom staff."

In addition, you can also go to someone's contribution page and click "User rights Management" to give them admin right.