I attended Catholic schools, and Bible study was never a part of it until high school, and then not much. It was mainly the Baltimore catechism - memorization of Catholic doctrine.
I’m so old I remember when Notre Dame was a Catholic college. With what has happened at that place why should anyone be concerned at what happens at a high school?
You’re right—they never did push the Bible thing at Catholic schools. Catechism was more important than the three R’s.