OK, so you are using the xbox-x console? I did not realize that (I have a PC, not an Xbox console). Does the description of the issue in this bug thread match what you are seeing?
Using my profile, MSFS loads perfectly on both a PC and Xbox Cloud Gaming. However, on my Xbox Series X it crashes within seconds of me pressing a button to start after the prompt to do so. I believe it is crashing while trying to sync my profile as I occasionally see this text flash up before it crashes (Xbox crash / CTD = MSFS stops loading, the screen goes blank for a second, and finally I’m returned to the Xbox homescreen). Hence I believe there is something ‘wrong’ with my profile saved in the Cloud which only causes problems with the Xbox.