I’ve only read your replies @Notfeelinghunkydory , but I was wondering if neurodiversity may have been touched upon. In girls it often presents as mental health issues (and they genuinely are due to years of masking bringing out huge anxiety). I was exactly the same as your daughter in secondary, I couldn’t cope with the new social structures, the work expectations, any criticism felt like a thousand needles. Unfortunately this was 20-25 years ago and adhd/ASD wasn’t even raised as a possibility so I’ve continued to struggle to this day. I ultimately utterly refused to go to school by 15, however I did scrape some GCSEs. I even went to uni (whole other story of stress and bad results but there we go).
What your daughter needs is full support and understanding. I know it’s extremely frustrating for you and the school but if it is underlying ND, and simply just mental health issues at all, no one is more frustrated or angry with themselves than her believe me. You have to keep fighting for help or recognition, write everything down she struggles with, try and get her to write down how she feels even if it’s in ‘odd’ ways. For example, when trying to describe my suspected adhd traits I say ‘I feel like my brain is a room where I’m stood in the middle and 20 other versions of me are all talking at once about things I need to do, things I forgot, silly little facts, ooh I should google that, I need to do housework, I have an appointment at 3pm, I must pick up a birthday card tomorrow, etc etc etc’. It’s maddening and completely ruins any real functionality outside of my whizzing brain. Whatever is going on with her, she is also losing function skills and it must be extremely frustrating.
I'd give her the laptop, I’d also ask her to use it to write down how it feels to be her. Not in a glib, affirmations sort of way. Just any way she feels her brain isn’t connecting to the world around her.