Hello - made an account just to say that this fix worked for me. Not sure why these services hadn't automatically started (save game syncing used to work, maybe the 24H2 update broke it), but starting these and setting them to automatic with delay, and then restarting the game, fixed the issue. Now my Avowed saves are correctly syncing between PC and Xbox Series X. Hopefully this solution will get bumped up in Google search results. Thank you!