Your Joomla website has a number of User plugins working with the User component.
These User plugins are not plugins used directly by your site visitors or Registered Users - but are User plugins in the sense of website User Management for example they are used by Joomla in the functionality of your registered user's Profile.
In Joomla version 3.10.x Plugins are managed via the administrator area menu 'Extensions' tab.
In Joomla version 3.10.x Plugins are managed via the Administrator area 'Extensions' tab and then selecting the 'Plugins' tab.
In Joomla version 3.10.x Plugins are managed via the Administrator area 'Extensions' tab and then selecting the 'Plugins' tab.