Dead43215 I'm not quite sure either as it sounds like you may have a different EA Account.
I'm guessing this is the case as your Apex progress and data is tied to your EA Account, so it wouldn't randomly go missing unless you had unlinked a platform account, (which is why I had asked if any platform account was unlinked).
Besides unlinking a platform account, the only other thing I could think of that causes a loss of Apex progress and data, is if your account was banned prior to Cross Progression hitting your account, as banned accounts were excluded from the Cross Progression merge, (which was rolled out to players between October of 2023 and April of 2024).