Currently, and this could change on a moment's notice, athletes that participate at the JuCo level do not begin their D1 eligibility clock.
https://www.ncsasports.org/blog/does-juco-count-against-ncaa-eligibility
Bryce Harper famously dropped out of high school at 16. The reason then was that a player could not be drafted prior to finishing high school. But there was a supplemental draft called the Rule 4 draft and one way to become eligible is by playing college sports. So how does a high school kid play college sports? They drop out of high school, get a GED, and go to a JuCo.
So my question is based off that experience but adapted to today's college athletics landscape. Do athletes that hve the ability to command NIL at a young age, essentially the Bo Bassetts and Cooper Flaggs of the world, drop out of HS to go to JuCos where they can begin making money even earlier while benefitting from greyshirt training and not harming their eligibility clock while also being able to compete without penalty.