There is no good solution for this. We tried and screwed up the Microsoft Store / Game Pass in one way or another. Why do you want to access these folders? I think the store and game pass app both allows changing the install directory.
I'm wanting to try to add mods to games such as Enter the Gungeon & Saints Row IV (since there's a mod to make cheats not disable achievements in Saints Row IV) and I need to copy + paste files into the install directory.
[Edited by Rhark, 10/18/2019 10:42:25 AM]