Among the surprising news stories to come out of Microsoft's Windows 11 announcements is its plan to open up its own Windows 11 Store to third-party app stores. Currently, stores like the Epic Games store and Valve Steam store sell their games via web stores but Microsoft is inviting them to sell their catalogs from directly within its own store.
https://www.notebookcheck.net/Microsoft-kicks-Apple-where-it-hurts-says-Epic-Steam-stores-very-welcome-in-Windows-11-Store-portal.547512.0.html