Here is one list of early college progams that might be worth checking out. Some of their programs might work for a younger high school graduate as well: https://www.hoagiesgifted.org/early_college.htm
I have known several people who started college very young - each for their own reasons. Some had skipped grades and finished high school younger than most of their classmates. Others ran through what their high schools and local dual-enrollment programs could offer, and left high school without graduation. All of them have turned out fine. Chances are that your daughter will too.