How to use multiple unity module or unityLibrary into native android application

Hello, Developers. I get one problem while I am following the given tutorial - https://forum.unity.com/threads/integration-unity-as-a-library-in-native-android-app-version-2.751712/

Based on this tutorial I have complete the integration. After doing all required changes my native application Gradle is building successfully. After running the application on real device, Only single Unity Game or Module is loading every time.

Means when I tap for opening first game then first game is opening. But when I am trying for the second game. Then also first game is opening. I am not able to understand the problem. Where I am missing the things.

I have already posted my question here - https://forum.unity.com/threads/integration-unity-as-a-library-in-native-android-app-version-2.751712/page-2#post-5895002 and https://stackoverflow.com/questions/61999970/how-to-embedded-multiple-unity-module-in-native-android

So below is the video link for showing the problem which I am facing. https://drive.google.com/open?id=1F4y-QH50eIkAtlbJnlRQ-ze1_2IS2yiz

After doing all research I am still waiting for the solution. Related to the same question many posts are still I have seen without an answer. So I am expecting some response from the Unity Technology Community.