Haven’t read the full thread but this from one of your posts rang so familiar to me: “She thrived in primary but it all fell apart once we got to secondary.” This is true of our son, too, and we were told it is a very common presentation of ND in girls and more intelligent boys. Our school is supporting without formal diagnosis with lots of accommodations (ear defenders, 5-minute pass, wellbeing pass) and they make attendance possible some of the time. But at other times he is just too overwhelmed to take part.
What some posters are not understanding on your thread is that it’s not a choice at the point he is overwhelmed, it is literally impossible form him to go into the noisy, boisterous hallways. As someone who knows him well and knows how much he wants to be doing his lessons and socialising ‘normally’, I can see the true disability - his brain stops functioning normally, he goes into fight or flight mode, and he can’t do the things he wants to.
Suggesting kids just push through at that stage is counterproductive and just extends the overwhelm and leads to further problems (like school refusal). Your school should know all this, should have seen it many, many times, and should be helping you.
It sounds like your daughter’s problem could be solved with a simple 5-minute pass. Something like this must be available for diagnosed ND kids and the school must know the wait for formal diagnosis is forever. I’d challenge them - firmly but without anger - that their approach is not helping, nor would it be expected to if you daughter turns out to be ND. I’d suggest a trial of a 5-minute pass and ear defenders to see if that improves outcomes for your child. If not, there is nothing lost. But if so, you get an anppropriate accommodation in place before her learning is further impacted. I can’t see how they can argue against this?
I’d also - firmly again, but without anger - make the suggestion of a trial in writing and quote relevant legislation. You can get a good summary by googling this string “send support before diagnosis what are schools legally required to provide” - the AI content has text you can use directly as well as links to the appropriate primary sources. You are in the right here and can push this firmly from a position of strength.
If the trial doesn’t help and/or your daughter turns out not to be ND, you will see that and then you must try other things. But this is an obvious first step they really must agree to - especially as you’ve already been to the GP and are awaiting assessment.