From the Oviedo ChargeOn Tour:
Not every UCF team is moving to the Big 12. The league doesn't sponsor men's soccer, so Scott Calabrese's program will join the Sun Belt (likely for the 2023 season, pending official announcement). UCF will be the 10th member of Sun Belt men's soccer, joining fellow affiliate members West Virginia, Kentucky and South Carolina as well as all-sport Sun Belt members Coastal Carolina, Georgia Southern, Georgia State, James Madison, Marshall and Old Dominion.
Marshall won the 2020 National Championship (played in spring 2021, delayed due to COVID).