It's not a big deal, but our defaults are wrong.

Icons:
https://github.com/flutter/flutter/tree/master/packages/flutter_tools/templates/app_shared/macos.tmpl/Runner/Assets.xcassets/AppIcon.appiconset

Should be smaller with rounded corners:
https://developer.apple.com/design/human-interface-guidelines/macos/icons-and-images/app-icon/