How to UNLINK Xbox One Series S/X from EA account, How to Unlink EA ORIGIN account from XBOX 2021
Open the Origin client and click the Friends button, then Add a Friend. If you do not have the Origin client installed, you can download Origin for both PC and Mac.
In the Import Friends menu, you can choose to “connect” your Xbox LIVE, PSN, and EA accounts. Simply sign in with your account details to connect. Something you can try is logging into the Origin site, which you can find here, with your Xbox details. If you can login, click the icon next to your name at the bottom left and select EA Account and Billing. On that page you can see if your Xbox account is liked.