Sure.
You're absolutely right that girls are underdiagnosed. Part of the diagnostic challenge is because girls are socialized much earlier on how they should behave, and they often go under the radar. Unless there is a particular behavioural response, they tend not to be recognized for that, but underneath a very quiet or calm exterior are often significant challenges and mental health issues that emerge later on in their lives.
Autism Ontario runs girls groups, very specifically, and brings girls together to help them deal with significant social pressures. Girls are significantly at risk at school, for date rape, and for other social challenges, in relationships as they get older, and even as they become young women making choices.