Your application supports only Android Pie (9) and Android Q(10) only.
To support vast number of devices, please change minSdkVersion to 23 and update target version to latest available i.e. 30.

Yes, Internet permission is required to show the Ads.

I recently uploaded my game on play store. The game works fine in my mobile. but i tried to install it in my friends(3-4) mobile phones it gives below error.
Your device isnt compatible with this version
Here is my android manifest

<application
    android_allowBackup="true"
    android_icon="@mipmap/ic_launcher"
    android_label="@string/app_name"
    android_roundIcon="@mipmap/ic_launcher_round"
    android_supportsRtl="true"
    android_theme="@style/AppTheme">
    <meta-data
        android_name="com.google.android.gms.ads.APPLICATION_ID"
        android_value="ca-app-pub-8853085470060311~2582555526"/>
    <service
        android_name="com.ak.fulligola.MusicService"
        android_enabled="true" />
    <activity android_name="com.ak.fulligola.HomePage">
        <intent-filter>
            <action android_name="android.intent.action.MAIN" />
            <category android_name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android_name="com.ak.fulligola.MainActivity" />
    <activity android_name="com.ak.fulligola.CharacterSelection" />

    <meta-data
        android_name="preloaded_fonts"
        android_resource="@array/preloaded_fonts" />
</application>

Below is my build.gradle

android {
    compileSdkVersion 29

defaultConfig {
    applicationId "com.ak.fulligola"
    minSdkVersion 28
    targetSdkVersion 29
    versionCode 2
    versionName "2.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}

}

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation 'com.google.android.gms:play-services-ads:19.2.0'
}

Please help to solve.
Also i have ads in my game. so do i need to provide internet permission.?