查看苹果关于UISceneDelgate/AppDelegate的文档
https://developer.apple.com/documentation/uikit/uiscenedelegatehttps://developer.apple.com/documentation/uikit/uiapplicationdelegate

应用程序ID变为活动、应用程序将进入前景等方法。

在这些方法中添加一个断点，然后您可以根据需要继续执行操作。

要检测用户是否点击了推送通知，可以在“AppDelegate”类中实现“UNUserNotificationCenterDelegate”协议，并使用“userNotificationCenter（_：didReceive：withCompletionHandler：）”方法。
以下是您的“AppDelegate”类的外观：

import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Set UNUserNotificationCenter Delegate
        UNUserNotificationCenter.current().delegate = self
        return true
    }
    
    // Handle notification when app is in foreground
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        // Display notification when app is in foreground
        completionHandler([.banner, .sound, .badge])
    }
    
    // Handle notification when app is in background or terminated
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        // Check if user tapped on the notification
        if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
            print("User tapped on the notification")
            // Handle the notification
        }
        completionHandler()
    }
}

仅当用户响应推送通知时才调用上述函数，如果未调用，则您可以考虑通过点击主屏幕上的应用程序图标启动应用程序。