I don't think there are any current ways to upgrade just yet. Since the game hasn't been released yet you should be able to request a refund and be able to buy a different edition after the fact
@BtheReaper49Yeah, you are referrring to this I think:
*NOTE: This issue will not affect EA Play members who have NOT pre-ordered Battlefield 2042 Standard Edition. Pre-loading Battlefield 2042 is not available for EA Play members, and therefore, EA Play members will have access to the early access trial when it goes live on November 12.
https://answers.ea.com/t5/General-Discussion/Pre-Order-amp-EA-Play-Early-Access-Trial-issues/m-p/10938981#M29812
I think that is correct, however I would have thought you qualify as an early pre-load by having GamePass Ultimate... either way, I think that is your answer.
