Thank you for your explanatory responses. I decided to look up an authoritative definition for myself. According to what I found, it isn't a medical term and doesn't have a medical definition, so means whatever people say it means. Which is I guess how language always works, it is just that it is a new word with roots that imply a broader meaning.
The lists generally exclude personality disorders, but this doesn't seem logical to me, although I am not a neurologist. I thought all brain differences arise or manifest as differences in the brain structure.
https://www.umassp.edu/inclusive-by-design/who-before-how/understanding-disabilities/neurodivergence
https://www.uhhospitals.org/blog/articles/2025/06/what-does-it-mean-to-be-neurodivergent
Ty!