Personally I would imagine she is yet another child stuck in our British system that teaches children to read too early. Remember in many other countries she would only just be strating school.
Be reassured that it does not matter how well your child is reading at 6 or 8 or 10 what matters is how happy their lives are at 26 38 and 50. Children in other countries who start reading later outstrip ours academically by their teens. But they have not spent several years trying to learn something, struggled and lost confidence but started later and found it easy.
So relax - instead of doing more I would do less. Read to her and show her reading is fun and something to aspire to and play lots and lots of board games, cards etc etc they learn the same skills
My grandson was in a far worse place he scored 11/40 in his phonics at the end of year 2. My daughter took drastic action and removed him to home educate and decided to unschool - ie do nothing but provide stimlating fun activity options and let the child choose how to spend their time. He has not seen a reading book, worksheet or flashcard since he left school in July.
And he can now read and spell - probably still not at the level of most of his contemporaries but significantly more than he could 9 months ago. It took six months of letting him relax and all the progress has come since Xmas. He is reading directions, signs and search engines - looking for fun science video on YouTube has improved his spelling more than 3 years of school spelling tests did.
I was very sceptical of her unschooling but it absolutely totally works. I know this is an extreme option not right for most people but it can reassure you that less is often more.
Apart from looking for things on YouTube the best non work type stuff I would recommend are board games, sesame street and getting them to 'help you find your way' round a hospital/supermarket.