Creating .aab bundle and updating your Android app on Google Play Console

Please follow the steps!

Step 1 – Open your project folder android/app/build.gradle and under defaultConfig update versionCode and versionName

 defaultConfig {
        applicationId "com.austroapp"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 2
        versionName "2.0"
    }

Increment your previous versionCode and versionName by 1.