Welcome back, chay.
You ask a great question, and fortunately there is a lot of rather new books and articles available.
Here are a few to help your friend get started:

The website A mighty GIRL has a post with A Different Way of Thinking: 30 Books About Autistic Mighty Girls

An interesting reading list of Books About Autism in Women (My 2021 Reading List)[/color][/i].

The amazon page for this book,Women and Girls with Autism Spectrum Disorder: [color:#999999][i]Understanding Life Experiences from Early Childhood to Old Age, has other links to follow.

This review of the book, I Can Fix It!, has other links to follow.