Scene1:
When i tried to send push notifications manually via Firebase coud Messaging console,it shows notifications without sound alert

Scene2:
When i disconnect my device then Restarted the "Run" in Adroid studio,its not receiving any Notifications, [I MUST HAVE TO Go to my Mobile settings>Notifications>selecting the app then toggle between Turn Off And Turn On the "Show Notifications"]

Scene3:
Even I have typed onresume(),onmessage(),onLaunch() functions,Its not showing notifications after closing the app

Scene4:
When i try to trigger Firebase Realtime Database,[When a entry is added or deleted i must receive notifications] its not working,But the code itself is deployed successfully??

Scene5:
Scheduled notifications are working fine with sound alerts too..but firebase notificationsare not working

Device: REDMI 4
IDE: VsCode ,Android Studio,