The sample says ” To appear on the lock screen, the user must add it manually
through the Notifications page in Settings.
When declared in the manifest as described above, the app will
appear in the list of allowable lock screen apps.”.

I’ve not been able to make the app show on the lock screen using the link from the app (internally it does a LaunchUriAsync( new Uri( “ms-settings:notifications”) ) ); maybe it works this way on Windows 8/8.1

In the Windows 10 emulator, you have to go to Settings/Personalization/Lock screen/Choose apps to show quick status