Hi T.,
It's very nice of you to be so concerned for your friend's daughter. I hope they are as concerned so they can do something for her.
It sounds like she's developing OK since she can talk, although social-emotional development is questionable. She may overcome this issue on her own, but if not soon she'll be left behind by friends in school. There is help out there the sooner she gets help the better for her own confidence. I can't believe the Dr. hasn't suggested something sooner. If it were my child I think I'd get a second opinion or switch Dr's.
They need to contact the school system she will be attending next year, ASAP. You don't need a Dr's order for this. The school system will probably do an evaluation to determine eligibility possibly for their special preschool for the rest of this year. There probably is no charge for this. There are specialists who know how to work with kids. The longer they wait the further behind she may be socially.
I wish them the best and hope that she responds well!
K. :)