I was going to say the same thing. Because its a very broad tree, but finding out may help you see the areas where she needs extra help and places like Dyslexia Action have lots of techniques and advice. If her spelling is good, maybe its not standard dyslexia but they may stlll be able to give some pointers of where to get help.
Maybe also try to find someone to give her a bit of One to One attention, particularly for maths as from the sound of it... she flies under the radar a bit at school. Sometimes children whose attention wanders in class or who are distracted have gaps in their maths knowledge and if those are filled are perfectly capable.
If you are worried, get on top of the syllabus.. eg, get some CGP books for her year. They are very colourful and sometimes they put things in context for them.
I found that having audio books in a book series they really enjoyed really amped up their reading skills, because they are listening to the words, the intonation, their place in the sentence structure. It increases their vocab and prediction skills and it really helps and I think its one of the most important things you can do. there must be so many on Audible or Spotify by now.
If she has to do any projects, there must be a tonne of You Tubes on the subject and you can set to sub titles.. so she can read anything she's missed hearing or can rewind etc.. use all the technology you can.
Is there a phone game for her age group, with instructions that she has to read.. for my son it was Pokemon.. he had to read all the instructions and directions and got very familiar with all the spelling and vocabulary. It also helped his reading and remembering instructions.. If its something she's interested in, she will work it out herself.
Try not to get too worried. She just needs a bit of help to catch up after having the difficulties last year. Children learn in fits and starts and sometimes they plateau for a while, but may have a leap upwards,
I've heard it said many times that not keeping up with reading and writing during the school holidays sets children back a bit.. so it seems like the ideal time to catch up (but make it as fun and lighthearted and as unschoollike as possible) . taking her to a library or similar to pick out her book of the week (plus icecream) Outings to galleries/museums/aquariums and then getting them to talk about them, was also something recommended to me. When they struggle with homework, or writing something I used to get them to talk through what they wanted to say first.. You could do a summer holiday diary, decorate it or press flowers or do it online with photos..music - what ever works to get her thinking about what she wants to say and then expressing it...would also really help her.
Also. Make an appointment with the school to discuss what they are doing to do to support her next year. She had a hearing problem. They should be doing something.
Im sure she will catch up soon. Best of luck.