When packaging with the msix pub package,
the logo path can also be configured inside the pubspec.yaml file.

To update the application image in the Store listing,
navigate to the Store listing step of the submission
and select Store logos.
From there, you can upload the logo with
the size of 300 x 300 pixels.

All uploaded images are retained for subsequent submissions.

Validating the application package

Before publication to the Microsoft Store,
first validate the application package locally.

Windows App Certification Kit
is a tool included in the
Windows Software Development Kit (SDK).

To validate the application:

Launch Windows App Cert Kit.

Select the Flutter Windows desktop package
(.msix, .msixbundle etc).

Choose a destination for the test report.

The report might contain important warnings and information,
even if the certification passes.