App-based assignment errors
Apple Configurator 2 supports app assignment only for devices with iOS 9 or later and tvOS 12 or later and apps that allow device-based assignment.
If an app doesn’t allow device-based assignment, you’ll see a prohibitory symbol on the app icon when choosing apps in Apple Configurator 2. If you try to select an app that doesn’t allow this kind of assignment in Apple Configurator 2, you’ll see the message, “This app cannot be assigned to a device.” You’ll also see this message if you move your pointer over the app name in the Choose Apps window in Apple Configurator 2.
Contact the app developer to find out if device-based enrollment can be enabled for their app. You can also verify whether device-based enrollment is currently available for an app before purchasing it—apps that work with this feature show “Device-Assignable” in their app description in Apple School Manager and Apple Business Manager.