Autistic children - and adults - are generally considered to be at a level of development two thirds of their chronological age, meaning your seven year old daughter is more like a four year old in terms of her functioning ability.
In your first post you appeared to minimise her issues by telling us that she is perfectly bright - this really has nothing to do with anything, as most so-called high functioning autistic people have normal intelligence.
What we DO struggle with, amongst a million other things, is task switching / sequencing (aka executive function issues ) and sensory overload, which is what's going on here.
I really really really think you need to do more reading on autism as it is experienced by autistic people, and to adjust your expectations of her quite sharply downwards. At one point you compare her to her peers - this is very concerning as she is developmentally disabled, they are not.
You need to be very much more realistic about what your disabled child can achieve, both at this stage and possibly later in life.
Around 80℅ of adults with with HFA are unemployed*. No I have not got that the wrong way round. That is a very very telling statistic. All the amount of "normal intelligence" in the world won't help you if you have massive issues with executive function and can't process incoming sensory information effectively because you exist in a world that is a blinding dazzling overwhelming bone-shaking tornado of Light and Noise and Feel.
I am 45 and as others above have said, I still struggle with all this shit and can only just barely hold down a minimum wage job.
My mother does not get this as I was So Bright At School.
Just saying.
- Source: Professor Elisabeth Hill, Goldsmiths University of London.