EA Sports FC 25 is very likely to join Xbox Game Pass Ultimate and PC Game Pass at some point in the future, as past versions of the series have followed this trend in recent years. However, it normally doesn't happen for many months.
Based on when the last game was added to EA Play, we're expecting EA Sports FC 25 to join Xbox Game Pass in June of 2025. In other words, it's probably worth buying it now if you're really keen to check out this latest version!