Do you have a game for the PC if you bought it in the MS Store for Xbox?
Yes. However, this does not apply to everyone.
For example, if you buy Forza Horizon 4, you can install it on your PC without having to buy it again.
(Forza Horizon 4 is an Xbox Ecosystem Exclusive game)
For example, if you buy Cyberpunk 2077, you have to buy it again on your PC, as it is not sold in the Windows Microsoft Store. You will therefore have to buy the game through a third party.
Yes it would be possible but you need Xbox Play Anywhere to do this, but this only works with the Win 10 operating system.
Here is a link to it!