Those who pre-ordered College Football 25 were disappointed when they first jumped into the game to find no fully playable Team Builder feature. You can only download the teams provided by EA.
COLLEGE FOOTBALL 25 FIRST UPDATE with patch notes + TeamBuilder NEWS (unofficial)
Yes, but the Team Builder website is not live yet. You can open and download some Team Builder teams from the Create and Share tab and Download Center, but these are only what can be considered test or temporary teams, as you cannot create your own team.
Once the Team Builder feature is fully released in College Football 25, players will be able to create their own college football program through a dedicated website, customizing uniforms, helmets, and fields. Players will even have the option to upload their own logo. You can then share your program or download one from another player to use on Play Now and Dynasty.
EA confirmed in a blog post today that the features coming to Team Builder will be fully released on July 18.