Do Not Disturb apps appear under both Silence Notifications From and Allow Notifications From or neither

iPhone 14 Pro, running iOS 16.3.1

Under Focus > Do Not Disturb, if an app is added to either Silence Notifications From or Allow Notifications From, it appears under both. And, if an app is removed from one, it disappears from the other.

Assuming I'm not completely misunderstanding how this feature works (there could be more documentation on it) and assuming it's not a bug...

What is the logic behind setting an app to have notifications both silenced from it as well as allowed from it at the same time?

And, how do you silence notifications from an app while Do Not Disturb is active if adding it under Silence Notifications From also adds it to Allow Notifications From?

Likewise, how do you allow notifications from an app while Do Not Disturb is active if adding it under Allow Notifications From also adds it to Silence Notifications From?