Here, I am using trial CRM so got this message (Contact your administrator for access to your organization’s mobile apps).
To see non-production environment apps, go to the menu icon as shown below in screenshot.
In menu Icon, there is an option for show non-production apps at the bottom, enable it.
Once you enable it, it will ask for confirmation.
Confirm and refresh the app list. Now you will be able to see all non-Production apps.