I'm a teacher and trained as a specialist dyslexia tutor to support my son when he was about 8. He wasn't really getting any support in school.
I've done some tutoring and always try to keep it fun - I know that dyslexic children (and adults) can be exhausted by the end of the day and just don't have any more to give, however hard they try. Lots of games to improve working memory, lots of confidence building. Maybe some auditory processing tasks. Tutoring really needs to be tailored to the individual and even when I'm tutoring 11 plus (which i do more of these days) I'll teach different children in entirely different ways if that's what works for them.
A couple of things that might help at home:
Talk to text when using Google docs (or similar) - children can get the story/idea down without compromising on using rich language just because they can't spell it.
Audio books - accessing that fabulous language without the mental exhaustion of reading it! This was a real game changer for ds.
Story cubes. TELL the story. Oracy is so important. Don't always focus on writing it down.
Word bank for subjects at school that can be easily added to/accessed. I had a fabulous booklet to add to for this (great for secondary) but I don't think they're in print any more.
Reading ruler (coloured overlay type MAY help. Not like for Irlens but it can stop eye strain. The same for a computer. I know they can be downloaded.
Keep up confidence and focus on things the child excels at rather than banging on about.
Writing mini books can take the pressure off. Also if your dc is a perfectionist (we all learn from our mistakes) it's not soul destroying if they go wrong on a little page.
Read the same book together - two copies. You can read out loud if they flag.
My heart bursts with pride for the little boy I used to worry about because he felt he struggled alongside his sisters who found it all so easy. He's 27 now and an absolute star. Still adores audio books!
Sorry. Went on a bit. It's a passion of mine.