There is a user level control in wpForo. A simple user even if he/she has an Admin usergroup cannot manage a user which have Administrator user role in WordPress. So, wpForo checks both WordPress user Role and wpForo Usergroup. If one of them has fewer privileges wpForo doesn't allow to manage another user. For example:

User X is Admin (usergroup) in wpForo and is Administrator (user role) in WordPress

User Y is Admin (usergroup) in wpForo and is Subscriber (user role) in WordPress

User X can manage User Y, but User Y cannot manage User X. because the user role of User Y has fewer privileges in your website.

Also, the user with UserID 1 has the highest privilege. Nobody can manage the first User of your WordPress, make sure you don't test with this user, even Admin/Administrators cannot manage this user. Because this user is the Website creator and WordPress installer.

How can i do this to obtain the same rights for admin and moderator in this tab