Flutter Local Notification not working in background?

I am using flutter local notification to display schedule notification in my app. But unfortunately it is not working when app is in terminated state.

Here is my code:

class Notifications {
static final FlutterLocalNotificationsPlugin _notifications =
  FlutterLocalNotificationsPlugin();

static Future<NotificationDetails> _notificationDetails() async {
return const NotificationDetails(
    android: AndroidNotificationDetails(
      'weekly notification channel id',
      'weekly notification channel name',
      channelDescription: 'weekly notification description',
      playSound: true,
      sound: RawResourceAndroidNotificationSound('azan1'),
      importance: Importance.high,
    ),
    iOS: IOSNotificationDetails(sound: 'azan1.mp3', presentSound: true));
}

static void init() async {
tz.initializeTimeZones();
const AndroidInitializationSettings android =
    AndroidInitializationSettings('@mipmap/ic_launcher');
const IOSInitializationSettings iOS = IOSInitializationSettings();
InitializationSettings settings =
    const InitializationSettings(android: android, iOS: iOS);
await _notifications.initialize(settings);
final String locationName = await FlutterNativeTimezone.getLocalTimezone();
tz.setLocalLocation(tz.getLocation(locationName));
}

static void showScheduledNotification(
int id, {
required DateTime scheduledDate,
String? title,
String? body,
String? payload,
}) async {
await _notifications.zonedSchedule(
  id,
  'Azan Time',
  '$body Prayer Time',
  _scheduleDaily(
      Time(scheduledDate.hour, scheduledDate.minute, scheduledDate.second)),
  await _notificationDetails(),
  androidAllowWhileIdle: true,
  uiLocalNotificationDateInterpretation:
      UILocalNotificationDateInterpretation.absoluteTime,
  matchDateTimeComponents: DateTimeComponents.time,
  payload: payload,
 );
 }

static tz.TZDateTime _scheduleDaily(Time time) {
tz.TZDateTime now = tz.TZDateTime.now(tz.local);
tz.TZDateTime schdeuledDate = tz.TZDateTime(tz.local, now.year, now.month,
    now.day, time.hour, time.minute, time.second);
return schdeuledDate.isBefore(now)
    ? schdeuledDate.add(const Duration(days:1))
    : schdeuledDate;
}

static Future<void> cancelNotification(int id) async {
await _notifications.cancel(id);
}

static Future<void> cancelAllNotifications() async {
await _notifications.cancelAll();
 }
 }

I have also added all properties in Android.xml file. But still it is not working if anybody know the solution of this problem kindly answer this question.