"The conference reported $46.2 million distributed to each of its schools in the last fiscal year. That includes Oklahoma and Texas, which are due to move to the SEC in 2025 at the latest."
"Big 12 sources pushed back at that assertion saying the league's next media rights contract — including newcomers BYU, Cincinnati, Houston and UCF — will reflect an increase from the current deal."
So the article actually says an increase from $46.2M. But I just left it at a little less than current to be more conservative.