-> to give a follow to a support case as requested by the customer
To perform actions like change password or edit details for a user the respective user needs "User Administration" permission.
And "User Administration" permission does not come with "operator" ACL by default.
If a user wants to perform actions like change password or edit user details it can be done by giving him "User Administration" permission.
But this permission is a global permission, with this permission he will get access to the "Manage Users" action in admin console and then he could be able to change/edit details for other users too.
This functionality is as per design.
if a user in admin console is unable to change their own password, and needs to have some other administrator change their password for them, this is a security risk as now the administrator knows the user password.
If you grant permission for the user to change their own password, and also be a user admin, this represents a security risk as now the single user has access to all user accounts.
to have the option for a single user to be able to change their own password, currently available in UMP and IM, so it should be available in Admin Console also.