My app language is set to system language. I switch between that and German.

Found an interesting blog post about this. https://www.donnywals.com/xcode-14-publishing-changes-from-within-view-updates-is-not-allowed-this-will-cause-undefined-behavior/

I have now tested on an iPhone running iOS 16 beta 8 using Xcode 14 beta 6. The problem is still happening. The app name is populated correctly in the shortcut in the Shortcuts app. I can use the phrase with the app name when I ask Siri to run the new shortcut. SiriTipView still shows ${APPLICATIONNAME} in my phrase.

That's my scenario also (sheet).

I just stumbled across this question. I know this is an old thread, but I know the answer for AppStorage. AppStorage is just a more convenient way of writing to UserDefaults. When you're not in a View just use the standard functions for dealing with UserDefaults (UserDefaults.standard.value, UserDefaults.standard.string, etc). I know this works because when I rewrote my app's UI in SwiftUI I had my Views use AppStorage but my underlying, non-view code I left untouched that was using UserDefaults.standard and it continued to work. Just make sure to use the same name in both places.