Cognitive behaviour therapy (CBT) has been thought to be less helpful in autistic individuals with co-occurring Obsessive Compulsive Disorder (OCD). Unfortunately, this (Cochrane) systematic review only identified one study comparing CBT and anxiety management and found the former to be more beneficial. These results underscore the need for further research into this issue.

Elliott SJ, Marshall D, Morley K, et al. Behavioural and cognitive behavioural therapy for obsessive compulsive disorder (OCD) in individuals with autism spectrum disorder (ASD). Cochrane Database Syst Rev. 2021 Sep 3;9:CD013173. doi: 10.1002/14651858.CD013173.pub2

https://www.evidencealerts.com/Articles/AlertedArticle/101957