@Pandora Maybe she needs to be made more aware of what she is feeling. Is she unable to voice how she feels. I don’t mean you don’t allow her, I mean do you think she feels unable to fit some reason.
My MIL told me she remembers the time when she was a young girl her father verbally scolded her for speaking up so she never spoke up again. This was very telling to me, because she is the most passive aggressive, silent treatment, won’t discuss what others her, person I have ever met. This one time her father snapped at her changed her for life! I’m sure it’s a little more than that, but I know I can’t pinpoint a time like that regarding my parents. They were screaming at me constantly. The way she described it, it was like she was quieted forever more.
My only point is, if she seems overly quiet and not expressive for what she needs or wants, and instead is constantly in a self soothing mode that might be something to get a handle on. I’m not assuming though, because obviously it’s good for children to be able to keep themselves calm when necessary. It’s a difficult balance for children.