'Flutter awesome_notifications and local_notifications schedule was remove after device rebooted

Schedule notifications doesn't show after I reboot my device.

I tried to this following steps but still not working for me. Flutter app BOOT_COMPLETED receiver doesn't work

Device : Oppo A92 Android version : 11

Though emulator works fine, but in physical device doesn't. Does anyone here know how to fix it ?

Btw I started creating mobile app from flutter so I don't have any experience in native development.

AndroidManifest.xml

MainActivity.kt

ServiceStartup.kt

Sources

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Solution	Source