Android app bundles are sometimes abbreviated aab so I find myself running flutter build aab which is incorrect.

Provide appbundle as a suggestion or actually make aab a shortcut for appbundle.

Screenshot of what I see.

Code that flutter tool uses for similar commands. Which probably should not change.
https://github.com/dart-lang/args/blob/7dc7fe0430709229ccc87c3eaae729aeffe10c56/lib/command_runner.dart#L242