Please Explain EA Play/Origin/Xbox Ultimate with EA Play.(Apps and Subscription)

I am an XBOX Ultimate Subscriber which has EA Play on it. I am an EA Play Pro Subscriber through Origin? as well paid in full for a year. Yet whether or not I log in to Origin or EA Play or Use my Xbox Game Pass Ultimate... I have different access for each platform. So for example: If I log on to the EA App it states I do not have EA Play and have no access to the games. When I am logged into Origin with the same credentials I am able to download Madden/Fifa 22 and play the EA Play pro games etc.. When I use my XBOX Ultimate Game pass which has EA Play built into it... I cannot play Madden22/Fifa22 But I get games like back4blood day one? This system makes absolutely no sense and I need help understanding because it seems like it is all nonsense from my interpretation. Please Clarify where boundaries are, where applications separate etc.. Thanks.