Is it possible to create windows' MSI installer for Xamarin form Apps Windows store? because some of our apps users disable windows store because of that can't install the app?
I don't think you can make an MSI for a UWP app (that it is a UWP built with XAmarin Forms is inconsequential), but you can sideload UWP apps or even install them from a web page. See this document: https://learn.microsoft.com/en-us/windows/uwp/packaging/packaging-uwp-apps
and to install from a web page: https://learn.microsoft.com/en-us/windows/uwp/packaging/installing-uwp-apps-web
And a more general doc on installing UWP apps outside of the store: https://learn.microsoft.com/en-us/windows/uwp/packaging/appinstaller-root