Parts of what you have written are like my DD, though perhaps my DD has slightly fewer quirks.
My DD struggles with focus. This was on her class teachers' radar, but not enough for the SENDCO to be involved until I asked. That's because she was achieving at expected levels at school and they were happy with that.
My DD has food issues, particularly around textures.
She won't wear various types of clothes. Definitely not jeans. Doesn't like sleeves over sleeves. Has to have the labels cut out of her clothes. Won't wear socks with seams.
She struggles to get to sleep - her mind buzzes and distracts her.
She struggles with handwriting. I think that's partly because handwriting actually involves a level of multitasking - getting letter shapes, spelling, punctuation etc all at the same time. But her written work comes out OK if she types.
My DD has diagnoses of ADHD and dysgraphia. I've wondered a bit about dyspraxia as she's not great with catching a ball, but she's not particularly clumsy. My DD doesn't seem to have autistic traits, though I've had a lovely argument with someone on MN about whether she could possibly have sensory issues and not be autistic.
Getting diagnosed has been really helpful to my DD and the adults around her. Some of the ADHD traits can be quite irritating, but a bit of understanding, that she isn't doing it on purpose, really helps. She also understands herself better. She's pretty open about her ADHD and other ND children seem to be the same, it's not treated as a negative, but just one of the many things that make up their individual differences. We have a few books about neurodiversity which have helped her.
The other thing that has helped is realising that DH shares most of the traits with her. We didn't realise until she was diagnosed, but it's pretty clear how similar they are. He is a fussy eater, wouldn't wear jeans until he was 14, has illegible handwriting, struggles with attention. So she can see someone like her as a capable adult.