I'm very dyslexic and have had a successful career, currently in a senior leadership role as well as 10 GCSEs, 3 a levels, a degree and several professional qualifications.
At work I'm considered one of the best and brightest because I see things differently, come up with innovative ideas and see problems in ways other people don't.
I had no idea though until my mid 20s when one of my managers had me tested in utter despair because I excelled at some aspects of my job and bombed at others.
Dyslexic people tend to have low self esteem because they will have gone through a lot of their life being told things like:
You need to try harder
You're thick
You'll never amount to anything if you carry on like this
Having to do "special reading" at school because you're just not keeping up, meaning you miss vital learning in other lessons
Not being allowed to take the higher level papers (eg Maths GCSE)
Simply feeling stupid because you don't "get" something
The things I had that were really helpful were:
A dyslexia coach, who taught me skills I use today
A good understanding of where I excel and where I don't - for instance, language is my top strength and maths is my worst. So I avoid jobs where I have to do a lot of analysis, mathematics etc as it's really stressful for me.
A really, really good understanding of what dyslexia actually is, as it's not a reading condition or a learning disability
I would say for you DD the key is to find a way to boost her confidence. She also really does need to find a way to navigate the reading thing as it's the gateway to everything else - I'm sure you're well aware literacy is key - but there are so many ways to access the written word she just needs to find what works for her (read aloud software, coloured glasses etc).
I'm not going to lie, dyslexia presents many barriers and frustrations. Whether it's someone deciding you're too stupid to do your job you're perfectly good at when they discover you're dyslexic (happened to me twice), people making fun of you (a lot) just the sheer exhaustion you get from having to try so much harder that everyone else (all the damn time) the embarrassment of the other bits of dyslexia no one talks about (eg getting lost easily including in the office you work in all the time).
BUT she can find her lane and her strengths and excel. Also, these days I quite enjoy laughing at people who get confused when I talk about being dyslexic as they can't compute how I'm so good at my job because they have preconceptions and instantly decide I shouldn't be able to read.