According to Microsoft, you can now submit Win32 apps to Microsoft Store.
- Support for more types of apps
Starting today, Windows developers can publish any kind of app, regardless of app framework and packaging technology – such as Win32, .NET, UWP, Xamarin, Electron, React Native, Java and even Progressive Web Apps. Developers can sign-up here to publish desktop apps, or build and package PWAs using our latest open-source tool PWABuilder 3.
You can visit it here:
https://blogs.windows.com/windowsexperience/2021/06/24/building-a-new-open-microsoft-store-on-windows-11/