When they are little, it's reading, writing, maths, loads of stories, history, geography, science, foreign language. Supplement with loads of outings, and groups - both social and more structured/academic (every county will have a home-ed network to tap into for this) and some regular sport and physical activity. Basically, exposing them to as many different things as much as humanly possible.
Then you build on it as their ability grows.
My children spanned three key stages and at least one would have been considered SpLD/SEND in a school setting; there's no way that I could have taught a "school-like" timetable simultaneously to them. We followed themes and arcs from history and science that they all did together but at different levels.
All of mine sat their first GCSE at around 13 (this is not unusual in home-ed because of the need to spread the load and/or the cost) and then we did have to switch a bit to following GCSE syllabi, obviously. However, we still did things that they don't cover in the NC (or are optional or only offered at A level), like politics, finance, world history, law, logic.
Often we would get together with other families to share the load.
We only ever did half a day of "academics" on any given day - which would have seemed lazy to an outsider who was used to a school timetable,
Alongside that, either as a family, a small group of friends or an organised outing, we supplemented this on a weekly basis with visits to loads of museums, education workshops (including the kinds that schools access), talks at places like the RI, author talks, lab work, factory tours, shows like Big Bang and the World Skills.
None of this is unusual, nor did it take a professional to devise. Much of it was common sense and general knowledge. But there also loads of resources online to get ideas from. I used to get my ideas mainly from books, though.