Hey @DEWEYCJ1234,
This sounds like your friend was prompted to link his account, and then linked it to a different EA account than the one that had all his progress.
Progress is stored on the EA account level, not individual platforms like Xbox.
This would be why he's back to level 1 - it's no longer linked to the account that had that progress.
Your friend will need to get in touch with our support team to look into this further, as we cannot make any changes via the forums.
Your friend will need to create a new case here and select Game Support > The EA app > I want to update my EA Account information or I need help logging in to my EA Account. From there he should be able to get in touch with the support team so they can assist further.