She's taller, bigger, stronger than all her highschool competitors. Her physique looks 25 but she turned 18 in September 2024.
What set Usain Bolt apart, besides his talent, was his size. He was just totally different physique. We're seeing this with Jane.
There is no answer from the other girls. For another HS girl to touch her times in the future they need to be at least 6 foot, fast stride rate, and long legs. And, of course, basic talent.