Agreed, it's not worthy of the MS Flightsimulator name if you cannot run it on a PC.
[soapbox]
And neither is it if it ends up like Microsoft Flight with limited scenery.
[soapbox off]
But fortunately that OS is covered (Windows 10), according to the bottom of this page:
https://www.xbox.com/en-US/games/mic...ight-simulator
You can also sign up for the Insider Program, supposedly giving a chance to playtest it and provide feedback in the development process:
https://fsi.microsoftstudios.com/insider-program-faq/