Customise Restricted Screen

I'm working on creating a locker app to lock the selected applications. After locking app, when you try to open the app a screen appears with the below message.

Icon

Restricted

You can not use Facetime because it is restricted

OK Button.

How to customise this screen, another locker app is able to customise it and on a button click it redirects to their app to unlock it.

also is there a way to get locked app names?

Customise Restricted Screen
 
 
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