How to access AppDelegate object and call method from other SwiftUI views

Question

I am working with the SwiftUI app and I configured my Push Notification setup in AppDelegate and it's working fine like below:

Messaging.messaging().delegate = self

        if #available(iOS 10.0, *) {
          // For iOS 10 display notification (sent via APNS)
          UNUserNotificationCenter.current().delegate = self

          let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
          UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_, _ in })
        } else {
          let settings: UIUserNotificationSettings =
          UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
          application.registerUserNotificationSettings(settings)
        }

        application.registerForRemoteNotifications()

Now I have to move this code from app launch to TabBarView screen where I can request for permission once login success.

So for that, I have created func in AppDelegate file like this:

func enablePushNotification() {
        
        let application = UIApplication.shared

        if #available(iOS 10.0, *) {
          // For iOS 10 display notification (sent via APNS)
          UNUserNotificationCenter.current().delegate = self

          let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
          UNUserNotificationCenter.current().requestAuthorization(
            options: authOptions,
            completionHandler: {_, _ in })
        } else {
          let settings: UIUserNotificationSettings =
          UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
          application.registerUserNotificationSettings(settings)
        }

        application.registerForRemoteNotifications()
    }

and calling it from TabBarView() like this:

init() {
        print("TabBar Init called")
        configurePushNotification()
    }

func configurePushNotification() {
        if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
            appDelegate.enablePushNotification()
        }
    }

But I am not able to get the AppDelegate object here and It's unable to call appDelegate method from TabBarView().

Any suggestion here why I am not able to get the AppDelegate object or is there any other way to get it?