Implementing Local Critical Alerts in iOS 14.6?

Apple has approve my request for an entitlement to use critical alerts. I attached my entitlement to my bundle identifier and created a provisioning profile and manually signed my app according to Apple's instructions: https://help.apple.com/developer-account/#/dev38c81d4cd

I also added a properties.entitlements file with the correctly modified bundle identifier and boolean "YES". My "Build Settings" does not have a "Code Signing Entitlements" within "Signing".

When I run the code below, I get the prompt to accept alerts, but then no critical alert. Any suggestions? Thanks!

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    var authOptions: UNAuthorizationOptions?
    if #available(iOS 12.0, *) {
        authOptions = [.alert, .badge, .sound, .criticalAlert]
    } else {
        authOptions = [.alert, .badge, .sound]
    }
    UNUserNotificationCenter.current().requestAuthorization(options:
      authOptions!) { (granted, error) in
        if !granted {
            print("The application requires Notifications permission to display push notifications. Please enable it in settings.")
        } else {
            
            let userNotificationCenter = UNUserNotificationCenter.current()
            
            var contentTitle:String?
            var contentMessage:String?
            var contentSound:UNNotificationSound?
            
            contentTitle = "Message:"
            contentMessage = "Critical Alert!"
            contentSound = .defaultCritical
            
            let content = UNMutableNotificationContent()
            content.title = contentTitle!
            content.subtitle = contentMessage!
            content.sound = contentSound
            
            let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
            
            let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
            
            userNotificationCenter.add(request)
            
        }
    }
}

}