Sigh... DD would very happily swap her extra time to not be severely dyslexic.
She did a mix of GCSEs and BTEC - anything with course work (often done at school semi-invigilated) she scored 98-100% on.
In class she works at an 8... because she can have a laptop with spell check and editing software, in exams she loses that software and her marks crash. She's top set for English and considered gifted at creative writing... but loses nearly 20% of the marks in English Language before she's even entered the exam room.
If you employed her, you would never know how big her problems are because she can use tech to fix them. But she'll have to work twice as hard as anyone else to read everything.
Luckily she's going into a sector where it's dyslexic heavy and nobody will care if she can spell, but if she didn't have that option I would be extremely worried about whether she would be discriminated against.
I do a lot of ghost writing as part of my job, and a lot of household names are profoundly dyslexic. They just employ other people to check everything, or re-draft or scribe everything.