@MojangSupport Does anyone know how to retrieve an old world that got deleted after is said “Sync Error”. it’s the last thing my friend and i have left of our childhood. It meant a lot to us. We expressed a lot about ourselves in that world while going through hard times at home

Just to confirm, is that error on Xbox that says "Failed to Sync World Data"? If that doesn't describe the issue, feel free to reply with a screenshot of the error. ^LK

That is correct.