You control the application entry points through Android Player Settings. You can set multiple application entry points for development builds of your application which helps you to quickly compare functionality and performance between different application entry points. However, you must only select one application entry point for release builds that you intend to publish. If you select more than one, Unity displays a warning message.
To set which application entry point/s to use for your application:
If you select more than one application entry point and build or export your application, Unity generates multiple activity entries in the Android App Manifest; one for each application entry point. If you open the project in Android Studio, you can specify which application entry point you want to run/debug in the Run/Debug Configurations dialog. If you install the built application on a device, there will be as many application icons as there are application entry points.