My DS has been identified with dyslexia and dyspraxia in y3 after years on standby.
He was slow to pick up reading and made classic dyslexic errors. At the start of y2, he was still on L3 books on ORT. His teacher did a dyslexia screening which indicated that he was showing strong signs of dyslexia. She also did a screening of coloured overlays, and when it was "his" colour, he instantly read fluently. He now has coloured overlays and exercise books (I buy the books myself and send them in each September) Within a week, he was on level 5 books (by contrast his sibling has just gone up to level 6 at the start of y2). He got Nessy intervention, which seemed to stall in y3 until he was 8, and it was the new financial year when he finally got assessed which we had to pay privately. He's back onto Nessy now.
He reads for pleasure but layout is critical. He likes little chunks of text, cartoon style or fact books. It is much harder when he's tired. I'll pretty much sign anything off as a read no matter how basic.
We share reading pages/ paragraphs/ lines. I read more challenging texts to him although times is more awkward as he gets older. I supervise Nessy in school. His class has no TA support and the TAs have become increasingly stretched in the last few years. It's a relief that I have time to support school, and I can fund some of the things that make life easier; the glasses, special dictionary, scissors, laptop. His teachers have been understanding all along, just no resourcing to spare.
My child is getting happier. Diagnosis has really helped as he now understands his difficulties, even if they don't make them easier.
Incidentally, he had slow speach development in his early years and I used the Peter and Jane books to help his sentence construction as the language is simple, repetitive and rearranges the word order.
You do have to be persistent. That doesn't mean "that parent", but regular nudging to get the right ideas in place, follow up promises and push to the next stage.