Tbf I know families with up to 5 children, all diagnosed with autism. I'm in the special needs world so I meet plenty of other parents of asd kids and some do have lots of children.
It's particularly common in high achieving, rich families, where asd type traits have allowed the parents to earn loads of money in say banking, and having a huge family is seen as social one upmanship.
They tend to have lots of children very quickly and by the time anyone is starting to query asd say at primary school, they have 5 kids, all asd.
Anyway, Georgia herself talks about not wanting her food to touch, which is a common asd trait...