The first named author in history? Enheduanna, a Sumerian high priestess, poet and lyricist. She’s known as the Shakespeare of Sumerian literature.
Although I have to point out that there was a piece of speculative science fiction called The Blazing World published by one Margaret Cavendish, Duchess of Newcastle-upon-Tyne in 1666, slightly predating Mary Shelley.
The first American mystery novel was written by Metta Victoria Fuller Victor, as well as the first dime novel, and the first crime novel…
This is the thing. Women have been doing awesome shit since there was awesome shit to do, we’ve BEEN THERE, and then maliciously and willfully erased us from the books to keep anyone else from “getting ideas.”