Flutter - android_alarm_manager not working in other screen except main method in android

Question

I am working with android_alarm_manager, and followed this steps:-

// 1. added permission

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>

// 2. added  service and receiver

    <service
        android:name="io.flutter.plugins.androidalarmmanager.AlarmService"
        android:permission="android.permission.BIND_JOB_SERVICE"
        android:exported="false"/>
    <receiver
        android:name="io.flutter.plugins.androidalarmmanager.AlarmBroadcastReceiver"
        android:exported="false"/>
    <receiver
        android:name="io.flutter.plugins.androidalarmmanager.RebootBroadcastReceiver"
        android:enabled="false">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"></action>
        </intent-filter>
    </receiver>

// 3. initialzing alarm manager 

    main() async {
     final int helloAlarmID = 0;
      await AndroidAlarmManager.initialize();
      runApp(...);
    }

when I add alarm in main() function, I'm getting true value for "val"

bool val = await AndroidAlarmManager.periodic(const Duration(seconds: 5), helloAlarmID, printHello);
print("isAlarmServiceSet: $val");

but when I try to use this above line in other file like HomeScreen etc. it's returning false value and alarm is not set for alarm manager.

Can anyone sugegst me a solution for this case?

Thanks.