I find it so hard to know what is ASD, what is anxiety and what is being a 13 year old!
It's probably a bit of all.
I work with teenagers with unclear diagnosis and what they almost all have in common is a mixture of not being understood by their parents and using this as a mean to manipulate to get their parents to feel helpless and letting them get their way.
What I was taught is that it's usually the parent that needs support and therapy more than the teenager.
Parents need to gain -or regain- confidence in their parenting. Ultimately, it is them that should be in control of what happens. At the same time, they need to be open to understanding their child's needs.
This involves Trust and Communication. There are a number books that provide guidance. Trust needs to be established on both sides and for this communication needs to be fluid and vice versa.
Each need to be able to talk about their needs and be listened to. Compromises then need to be found.
For instance, mum want teenager to do the washing up right after dinner. Teenager says that dinner is stressful for them so need to relax listening to music afterwards. They agree that teenager does washing up listening to music without the need to engage with parent.
The worse thing you can do is dramatising her situation and acting like you constantly need to make allowance to make up for how hard she has it. You need to acknowledge her difficulties without feeling sorry for her and compensating. Compromises go both ways and at the end, YOU are the parent and should always have the upper say.