TAMPA, Fla. — The wave of new rules that have transformed the college sports landscape and empowered student-athletes to earn money off their name, image and likeness has found another fertile home: high school athletics. 

Dozens of states — from New York to California and now Florida — are all backing student-athletes in a paradigm shift in sports.  

Florida becomes one of more than 30 states and D.C. to give high school athletes the green light but with plenty of guardrails. That…