Some children enjoy "academic" things for fun. My friend's daughter finds maths workbooks as fun as colouring in.
Developing areas of interest is fine. Supporting areas of weakness is fine- DS goes to tutoring to support his literacy. He's dyslexic, plus has more gaps in his knowledge than his sibling because of losing half of y2 and chunks of y3 during the Covid years and has floundered around random gaps struggling to catch up. His dyslexia assessment revealed a spikey profile so to a teacher dealing with a class of 30 he looks broadly average because he uses his strengths to mask over some of his difficulties. From experience, doing it myself is highly unlikely to be successful, and will be stressful to us both, and it's better to outsource to professionals.
Hothousing for the sake of it is not healthy for the child. Children need time to explore interests, burn off energy, play, socialise and zone out.
Out of school we do sporting activities, and Scouting. DS2 has more capacity to be busy than DS1. Weekends/ holidays don't have commitments and we go out into natural spaces, museums and there's a lot of informal learning. Despite the disadvantages of dyslexia/ dyspraxia, their general skills perform favourably with their peers. They're naturally "bright", curious children and while schooling is important and the obvious pathway to a better range of choices in adulthood, it's part of their learning and school can't fully develop their potential as rounded people.
I'm trying to develop who they are, but not make them be someone that they're not. It's not about them being their best, just helping them thrive.