my xbox app and microsoft store are bugged

Xbox app for Windows 10 is basically a frontend for Microsoft Store app. I had the same problem, but with an other dependency and downloaded it by using Microsoft Store fixed it for me, but the issue you mentioned should still be considerd a bug.

Had a similar bug before. Just uninstall the whole game and install it from the Microsoft store and not through the Xbox app.

on a pc and i fixed the issue microsoft store app was bugged took 3 app resets to do it but the issue is fixed

I understand. Since you're able to install other games through the XboxGames folder, this may be a bug on the app itself. I recommend to submit a report or file a bug to Windows/Xbox team for them to investigate the issue.

Alternatively, try to install your games through the Microsoft Store app or through the website store if it uses the XboxGames folder instead of WindowsApps.

I was experiencing Technical glitches and bugs on my windows 10 PC trying to sign into to xbox app for about 3 days, no usual fixes from the xbox microsoft forums helped me at all. Anytime i would try to click sign in on the xbox app or after opening a game it wouldn't do anything. Just bug out a little. I first opened services and made sure all the xbox related services were started. You can open your services by searching "services" in the Search Bar In the lower left hand corner of your taskbar. Scrall all the way down and then right click each xbox related service and then select start. After that i opened the microsoft store and downloaded another xbox related app. To be specific Xbox Accessories. After it finished installing it prompted me to sign into my microsoft or xbox live account. After signing in with microsoft from this App. It automatically fixed all the bugs, and actually signed me into the xbox app as well. Hope this helps.