The "unvirtualizedResources" capability added to the MSIX package as a fix to PICARD-2678 is preventing the deployment to the Windows Store.

This capability is restricted and not allowed for general applications. According to Microsoft:

This capability is designed for certain types of desktop PC games that are published by Microsoft and our partners. It's also needed for apps packaged with external location (see Grant package identity by packaging with external location). It is not intended to be used for other scenarios, because it could compromise the system's ability to uninstall cleanly.

See also https://learn.microsoft.com/en-us/windows/apps/package-and-deploy/app-capability-declarations#restricted-capabilities