Thank you for your reply. Is it possible to transform opaque applications token from parent to child through web server? I think I have to transform it in order to set restrictions of child's app by using parent's device.

Did you resolved this problem? If yes, I want to know how you did it.

Thank you for your great help. I'm trying to share applicationTokens with DeviceActivityMonitor Extension, but it doesn't work. I tried some way. For example, I tried to save applicationTokens by using UserDefaults. However, I couldn't do it because the data type of applicationTokens isn't appropriate for UserDefaults. I considered other options like key-value or keychain. But, they seem that they can't save the data type of applicationTokens. Do you know how applicationTokens can be saved and can be transmitted to DeviceActivityMonitor Extension?

Thank you. I could do it.