To configure users and their permissions for the Mobile App, you need to work with the existing permissions being used for the Portal. This article discusses them in detail.
Please also see the article on Implementing the Operate Mobile App, to learn more about setting up your mobile users.
Below is a snapshot of features available in the app and the access granted to different users:
A couple of things to note are:
The app has no homepage and displays the News Feed instead.
If a feature is not available in the app but a certain user group has access to it, please be aware that this only refers to the Portal, since the feature is not available in the app.