A number of achievements are not unlocking despite the in game challenges unlocking. For instance, Greed over Need had unlocked in game, however on the Xbox achievement tracker it’s stuck on 99%. Similarly, the achievement Bone Skewer had unlocked in game and shows 87%.
Would be a good idea to fix this before Diablo 4s launch, as many others on here are having the same issues. Starting all over again is not the solution, and never should be.
Edit: playing on an Xbox Series X, and other achievements have unlocked correctly (in game and on Xbox) between these two mentioned.