cd android
./gradlew assembleRelease

Before uploading the release build to the Play Store,
make sure you test it thoroughly.

mkdir -p android/app/src/main/assets
react-native bundle –platform android –dev false –entry-file index.js –bundle-output android/app/src/main/assets/index.android.bundle –assets-dest android/app/src/main/res
react-native run-android –variant=release

cd android && ./gradlew bundleRelease -x bundleReleaseJsAndAssets

– Your AAB will be present in the folder
/android/app/build/outputs/bundle/release