MCC Not Recognizing Games Are installed

I recently uninstalled and reinstalled MCC (physical XB1 copy) in an attempt to fix the audio bug for CE and Halo 2 Classic that others have already reported experiencing. However, despite the installation screen showing that all games are installed, whenever I attempt to play any of them it is then claiming that I don’t have them installed.

I really don’t know how to go about fixing this, since uninstalling is what got me into this mess in the first place, and I can’t find anything on the internet about this bug (the top results of a google search into the matter are my own posts on Reddit asking for help!) and for that reason I don’t hold much confidence that the ODST update will fix the issue, since this is apparently an unknown bug

Does anyone have an idea on what might fix this???

I think I can feel you since I had this issue back in october 2019. I bought ODST and Reach, but the game somehow did not recognized them as installed.

Now, I am not really sure how I fixed it, since I just didn’t know what was I doing to begin with.
But, what I did was, I uninstalled and reinstalled them both for like 2-3 times, and after that, somehow the game recognized them and I could play fine. I haven’t had the issue since.