It’s a lot of work in college ball to prepare to be a hitter and a pitcher. My son found it hard enough preparation time wise to be an infielder and an outfielder. As mentioned there are only a handful in D1. These are typically crème of the crop, future draft pick players.
At the D3 level there likely to be more two ways. But you better be awesome at both or you will get moved to one or the other.