I can show things like name and email. But when I add a parameter in a text string, userRoles is not listed. Yet language, timezone are. Looking at the domain model for System, I can see the User entity and the associations with session-user, user_timezone, user_language and UserRoles but only timezone and language are available in the string parameter. So can I add role info to the overview?
A user can have multiple userroles. Lists cannot be converted to a string like that at the moment. If you want to have a string with the userroles, you'll have to put it together yourself in a flow. Alternatively, you can show the selected userroles in a reference set selector.