my now 12yr old DD2 was assessed and DX finally as severely dyslexic just as she went up to secondary school, just last september.
TBH, the school have been utterly wonderful with extra help, sorting her out with a private tutor for the first term who came to OUR HOUSE, and also setting up scribers and readers for her for her CAT's tests (the ones they do to stream them as they start), and getting the funding ready for the same for when she does her yr9 SAT's.
once she is in yr9, they will then get the funding set up for more scribers and readers ready for her GCSE's, and also funding for a laptop should she still be in severe need. We are lucky tho, as the in-laws stepped in and bought her a laptop anyway , and the improvemnet already is massive.
in fact, she did some test's yesterday to assess her for her next IEP, and her reading age hase jumped from 5.9yrs (she was so very behind ), to 10yrs.........so much so quickly, she is thrilled and her bouncing when she got home was delightful.
her maths and spelling have also leapt, altho not quite so dramatically, but the fact that the improvement is so immense anyway just proves how good everyone is being, and how well DD2's confidence has improved with it too.
I would, for you and your DD, see if you could also ask to see SENCo with her too, as they would be the first port of call if you have concerns......be aware tho it is a long hard slog getting them to do any type of testing......for my DD2 it has been 2yrs on the list to be assesed, and 3yrs before that of me fighting just to get the school to listen to us.......we even had to change schools to get the right response!!!
good luck, and if all else fails, you could go private, altho I have no idea on how that goes as we never ended up going that route.