AndroidManifest.xml

Add These Permissions files to android/app/src/main/AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Add These Tags to Application Tage
After android:label="you app name"

android:requestLegacyExternalStorage="true"
android:usesCleartextTraffic="true" <!-- only if you use http not https, or you're testing the app-->

Example GitHub Example

(optional recommended) add fcm high notification priority

    <meta-data
           android:name="com.google.firebase.messaging.default_notification_channel_id"
           android:value="high_importance_channel" />

Example GitHub Example