My daughter was diagnosed with Autism last week and also Selective mutism.
She is 14, I did not know anything about them both until I read about it online.

She struggles a lot with them both, Has anyone heard of Selective mutism?

I have heard of selective mutism. When I was in elementary school, two students had it. Eventually they overcame it in their teens.

This anxiety disorder is more common in children. People with ASDs are more susceptible to this group of disorders for many different reasons.