Neurodivergence doesn't cover neurotypical; neurodiversity does. As I said, in the same way that ethnicity includes white people, while "ethnic minority" doesn't, in the UK and US at least.
To be fair, it's not a massively useful term, largely because people argue over what it means, rather than getting the point that everyone's brain works differently to anyone else's, even if only in small and subtle ways. It's like "allistic", which some people take to mean neurodivergent people who are non-autistic, whilst others understand it as "everyone who is not autistic". This largely stems from a lack of education and understanding of neurodiverse conditions, and the paucity of well-used language around them.
"Everyone is a little bit on the spectrum" is a horrible phrase, because it completely misrepresents what the autistic spectrum is - it's not a scale from "not autistic", to "very autistic", but a collection of traits that are associated with autism, and which autistic people may have one, some, or all of.
I hate to rely on the garbage-spewer that is AI, but, when asked the question, it gives the following:
Yes, the term "neurodiversity" encompasses all variations of brain function, including both neurodivergent individuals and neurotypical people, recognizing that all brains are different. It emphasizes that these differences are natural variations rather than deficits.
So I'm sorry, but you're not correct in your assertion in this instance. One of the important points of the term "neurodiversity" is that it is inclusive, and defining a term essentially as "all the different ways human brains can work, except you" is both horrible and unuseful.