@MinedAura194617 No you are correct that if you pay for Xbox Game Pass you should have access to all the EA Play games at no additional cost ( does not include the premium EA Play Pro games however).
The above replies were alluding to the need to pay a seperate subscription for each platform you want to use EA Play on. For example, if I have a PS5 and subscribe to EA Play, I cannot login and use EA Play on my Xbox or within Steam (they will ask you for payment).
The one exception for this may be with Game Pass ultimate as that is one subscription that covers Xbox and PC, and both include EA Play.
The way EA has handled this is pretty confusing and anti consumer but I've made my thoughts clear on that in other posts.
