If I buy games in the windows 10 store, can I play them on the xbox?
Theoretically, both are from Microsoft
I don't know about it for sure but that's not true.
Games only run on both systems after purchase if they also support Play anywhere and that is not all. An Age of Empires can't be played on an Xbox despite being a Microsoft game.
However, this should be the case with the respective title. The questioner should check the store again.
OK
Then I'm sorry I didn't know
No problem, that's why I corrected it.
Only if you don't know something, it is better not to answer than to answer incorrectly.