Quote Originally Posted by Iaito View Post
Go to the same store page where you bought the game, log in, and go through like you're going to purchase it again. You'll get to a screen that'll show you all the games linked to your account. You should see Endwalker there with a red button that says "Show registration code". It SHOULD (operative word) show both the early access and regular codes.

I spent an hour and a half trying to figure this out and it worked for me but I'm not making any promises for anybody else
Hmm, if I proceed with the step "go through like you're going to purchase it again", it appears it's just going to let me buy it again. I'm presented with the screen to add a payment method, review order, then check out. It does not redirect me to any screen showing all the games linked to my account.