The Content and Space Report can be accessed by any user with a Confluence login. Access to the Global Report needs to be granted by an administrator.
An administrator can grant user groups access to the Global Report (read-only).
In the Global Report, tap on the menu "Access Permission".
Enter the name of the desired Confluence user group(s).
Members of the selected group(s) can now access the Global Report via Apps → Viewtracker - Global Report. They will, however, not be able to access any Viewtracker settings (read-only mode).