My sources are people (at least 2) whom I know IRL, who work with people with autism one way or another (which is group I'm part of).

FWIW, here are some sources I found with a quick DDGing:

1) https://www.hearingsol.com/articles/adhd-and-autism/

2) https://www.spectrumnews.org/news/large-set-brain-scans-reve...