Hannah's limitations will not allow her to be a 1st round pick. Her height is SF/PF level. But she doesn't have SF/PF skills for ball handling, shooting, and defense. She brings plus athleticism, but at the pro level you typically have to partner that with skills.
Getting and keeping a roster spot will be difficult for her unless she can improve her 3pt% up to ~30-35. While she's shown an ability to increase her FT% every season she's a career 22% 3pt shooter at Iowa with no improvement shown, so that doesn't look to be in her future.
Or maybe she magically gains another 2-3" of height over the next year.