If an app is already installed, you can extract its base.apk using these methods: bundletool | Android Studio
You can find specific "Base APKs" on various reputable hosting sites: Download base(2) apk
Users often look for the "base" APK when they want to backup an app or share it outside of the official Google Play Store. If an app is already installed, you can extract its base
: A specific lifestyle and rewards app titled "Base". If an app is already installed