Xbox Insider should have a system backup/restore feature, just like Windows, to make things...

Error 0x80070003 is a type of Windows file backup and restore error code. This erroroccurs when you try to create backup and restore files by using Windows Backup and Restore
feature. Luckily, there are manual easy do-it-yourself methods that you can try at home without spending money to hire a computer

You use some Insider Program?

try make soft Reset, go in Settings > System > Backup & Resore > Restore Keeping your Files and Games

Hello try make the soft reset in your Xbox going in Settings > System > Backup & restore and Make the Factore Restore keep your games. Maybe this is some backup of your profile.

Try make soft reset, Settins System Backup and restore, restore factory keep the games and personal files

Hello Deathstroke, my name is zahir, a independent advisor.

If you log back in, you should be able to redownload your skins.

If your Minecraft save disappeared and you have a working backup, you can restore the Minecraft world from your backup. Your specific backup may be different based on your Android device and version, but the process for iOS is fairly standard and boils down to restoring your device through iCloud. We’ve covered variations of both below:

Android

These instructions involve restoring a backup from Samsung Cloud.

Go to Settings, then Accounts and backup.

Choose Restore data.

Select your device

Ensure you’re restoring the Minecraft app (inside Apps), then tap Restore.

https://7datarecovery.com/blog/recover-minecraft-world/

This link will provide picturs as well of you are having difficulty.

Regards
Zahir