Siri + Shortcuts on iOS 16 - For some devices "Turn on 'MyApp` shortcuts with Siri" notification shows, others not

I have implemented AppShortcuts in my app like the below and the shortcut seems to work correctly by tapping on the shortcut directly (within Shortcuts app) for all devices.

For two of my test devices, only had to utter the first phrase after app install and we correctly got the notification:

"Turn on 'MyApp` shortcuts with Siri?"

After saying yes, Siri + MyApp Shortcuts continued to work correctly.

Unfortunately on two of my other test devices, after uttering the first phrase, never got the notification, it merely opened my app (which, openAppWhenRun is set to false for that AppIntent, so it shouldn't).

Can you help me with any hints as to what may be causing the two different results?

@available(iOS 16, *)
struct MyAppShortcuts: AppShortcutsProvider {
  
 @AppShortcutsBuilder
 static var appShortcuts: [AppShortcut] {
  AppShortcut(intent: MyAppIntent(), phrases: ["Get my \(.applicationName) code", "What's my \(\.$service) code with \(.applicationName)", "What's my code for \(\.$service)"])
 }
}
Siri + Shortcuts on iOS 16 - For some devices "Turn on 'MyApp` shortcuts with Siri" notification shows, others not
 
 
Q