The store is also an app on windows and is sometimes an hard dependency to install apps that only exist on the windows store without having to jump through many hoops. It's usually part of windows itself in the regular retail builds of windows, but LTSC which is meant for enterprise and embedded system does not include it. Installing it is not straightforward which is what this repo provides.

There's no source code, it's a just a bunch of binaries and an install/uninstall script.

Edit: I should clarify that the link provided in the repo is not the microsoft store that the apps refer to. This would be a better link https://apps.microsoft.com