In my opinion this is linked to the shutdown of windows phone. If you haven’t been following it it went from Windows Phone is dead[1]. To Bill Gates use Android[2]. Subsequently Windows Phone was removed from the Microsoft Store.

[1]: https://windowsphone.stackexchange.com/questions/16686/as-20... [2]: https://www.theverge.com/2017/9/26/16365424/bill-gates-andro...