She can fuck, but even with preocious maturity, you would still need to wait around 3 years for the go become fertile.
7 years old ...
https://youtu.be/0bdXkpgZ9dU?si=W6gMtzdXT02zntGA
have i under-estimated how young kids should start fucking ?
in Judaism you become an adult at age 13 but that was in an environment of scarce food and we live in an estrogenic high-calorie environment ... girls must be maturing much younger now.