You're right -- but where you're wrong is that they still have games in the new contract as well:
"In 2024, Southern California and UCLA are scheduled to join the Big Ten, adding the Los Angeles market to its footprint.
With ESPN out of the equation for Big Ten football after a 40-year relationship, the league is set to lock down three prominent time slots with its network partners.
Fox, which has shared the rights to the Big Ten with ESPN since 2017 and owns a majority stake in the Big Ten Network, will continue to feature noon Eastern time as its primary game of the day.
Fox and its cable network FS1 will have the rights to more than two dozen football games, at least 45 men’s basketball games and women’s basketball games."
The Big Ten has reached seven-year agreements with Fox, CBS, and NBC to share the rights to the conference's football and basketball games starting in 2023.
fortune.com
So in the end it nets out to the same amount of B1G on Fox channels for basketball. Which ultimately does not affect the Big East good or bad.