Hi there,
That sounds like a really interesting and important research project!
I’d recommend getting in touch with your Students’ Union, as they often have a president, officer, student representative or network that supports neurodivergent students. You could also ask any disability or inclusion societies if they’d be happy to share your survey with their members.
Notice boards can also be useful for finding participants, and some people contact their school’s admin unit to share a callout via email, though this depends on the university and its policies.
Hope that helps, and good luck with your research!
Megan (LJMU Rep)