[project]/build/app/outputs/apk/release/app-arm64-v8a-release.apk

[project]/build/app/outputs/apk/release/app-x86_64-release.apk

Removing the --split-per-abi flag results in a fat APK that contains
your code compiled for all the target ABIs. Such APKs are larger in
size than their split counterparts, causing the user to download
native binaries that are not applicable to their device’s architecture.

Install an APK on a device

Follow these steps to install the APK on a connected Android device.

From the command line:

Connect your Android device to your computer with a USB cable.

Enter cd [project].

Run flutter install.

Publishing to the Google Play Store

For detailed instructions on publishing your app to the Google Play Store,
see the Google Play launch documentation.