Update just in case it helps someone.
I’m continuing to do past papers every other day and memory and recognising the questions has started. I’m still averaging grade 5.
I’ve started to use my memory palace (if you wish me to give details on this let me know) to expand from titles to method as well. I’ve also started to use loci/Roman room method for times tables. I pick a house I know well, that links to the times table, then place the answers round the house.
I’ve made a play list on You Tube for maths question shorts. There are a lot from the USA and India, so search for the maths question and not the gcse or Alevel. Most of the questions are really easy when someone explains it - find someone who gives details you like. A lot of the UK teachers don’t give the detail I need to understand the whys etc.
I am actually beginning to enjoy maths - shock horror I know. It’s like a detective story and one needs to solve the clues to find the criminal. I like detective books.
I must remember to go back to the curriculum to make sure I include everything. Primrose Kitten also does a good revision tick list which is a free printable.
I’m still struggling, but I think a change in mindset is good. See the questions as a puzzle like chess or crosswords - others can learn the skill so I can too. Maths isn’t a born skill everyone learns it.