Where do you find these stats for college players?
SI did an article on him -- https://www.si.com/nba/draft/newsfeed/a-scouts-take-gg-jacksons-off-ball-value-and-upside
Jackson’s high ceiling is clearly tied to his shot creation and shotmaking ability as a big wing handler. However, he offers tremendous value operating off the ball, which raises both his floor and overall versatility. ...Strictly from the eye test, Jackson projects as a valuable off ball shooting threat. He’s a confident shooter and talented shotmaker with touch and a fluid shooting stroke. There’s understandable concern about his 32% three-point mark, but the off ball numbers paint a cozier picture that should relieve most concerns about Jackson being a trustworthy, gravity holding floor spacer.
Jackson knocked down 35.7% of his spot up threes (30-of-84). He connected on 34.3% of his catch-and-shoot threes (37-of-108) and shot at a 36.2% clip on unguarded catch-and-shoot threes (17-of-47).