Hi there,
If you unlink your platform account and link it to a different EA Account, any entitlements, like in-game rewards, points, and items, will remain on the EA Account that your platform was first linked to.
You may want to look into changing the email address on the account or merging accounts instead, but that would first require finding the email address for your old EA Account.
Since we’re not able to help with account issues here on the forums, it would be best to reach out to our support team for further assistance.