littlelawdad Thanks for that information!
Just to rule out another EA account, please check your Account Information page for the 'Member since' statement below your username. Since you mentioned playing Apex since its launch, your EA account should've been created between 2019 and 2020, if not earlier.
If the date doesn't match that timeline, it indicates you used another EA account to play in the past. Since game progress is stored on the EA account level, you'll need to locate and re-link your Xbox account to it in order to regain access to that progress.