A couple of researchers are going to be doing a study "that would attempt to investigate the potential causal relationship between autism and cPTSD".
For information regarding this study, and explanations about who is welcome to participate, one of the researchers, Nicole Filippone, has made a Facebook post detailing everything. (You don't need a Facebook account to see it).
If you're interested and want to sign up to be notified about when the study will begin, you can go here: https://www.nicolefilipponeauthor.com/my-links
I have signed up myself, as I suspect I am autistic and definitely have cPTSD. Hopefully it will be insightful!
Please boost this so the study can get as many participants as possible!!