“Connecting to Ultimate Team is not possible at the moment.”

Fair point if Season Online works and online matchmaking is fine elsewhere, then it’s probably not a PS5 install or local connection problem. That makes it look more like an EA-side Ultimate Team session/account sync issue. I’d still keep 2FA enabled and avoid reinstalling again, because that clearly isn’t fixing it. Best move now is to report it as an Ultimate Team access/session bug and mention that other users are affected too, so EA can check it server-side instead of treating it like an individual console issue.