How old is your daughter?
Has she ever advocated for herself?
I agree that shy and quiet students tend to seem withdrawn and this can make them appear not interested or not aware of what is going on.
Also if your daughter has esteem problems, this is something she will need to work on, or she will always be perceived as not able to keep up.. Even just socially.
If you hover, always speak for her or assume the worst in others perceptions of her, you are going to perpetuate her behaviors.. She is never going to feel empowered.
Moving her around from school to school instead of teaching how to handle her situations is telling her, she cannot handle these situations.
Empower your daughter to at least not always assume people are judging her negatively.. Then work on her looking at people in the eyes. Then help her with speaking up for herself.
Once our daughter was in middle school, we as [arents were encouraged to first have our children speak with teachers about situations or concerns..
Or if they were having social concerns to speak with a school counselor or Asst. Principal..
Yes, our daughter is very shy and quiet, she is an observer of people, but I HAD to allow her to speak for herself. I knew this was just as important as her math, language arts and science.
I know it is hard as a parent to allow our children to grow up, to be uncomfortable in some situations.. but they need to overcome their fears and their weaknesses to be able to grow up and gain self confidence. ..
If you feel you are not the person to help her with this, find a therapist.