BYU has less than 10M total viewers combined across every game so far this season.
Utah has nearly twice that many, despite being stuck with the PAC Network for some of their games. This year alone Utah has 3 games over 3M (Florida, USC, Washington, and actually got over 5M in the Washington game)
Do you know the last time BYU drew over 3M in a non-bowl game? 2015 vs Nebraska.
It's coming up close to a decade now.