Our App Store version is still compiled with Xcode 11.7
Install it from the App Store on an iPhone with iOS 14.0 final (18A373)
Launch the app. Whenever the first network action is started, the system popup is shown.
Allow permission
Check Settings -> Privacy -> Local Network -> App Name is present with the toggle enabled.
However, we wanted to see the system permission popup again:
Delete the app
Repeat steps 1 till 3 from above
No popup is shown but local network access is silently accepted.
Check Settings -> Privacy -> Local Network. The App Name is not present. So it's not possible anymore to disable local network access.
And another bug for developers, as there seems no way to show the system popup a second time. For example to validate the localised version of NSLocalNetworkUsageDescription, which doesn't seem to work either: https://developer.apple.com/forums/thread/657856