building a higher sensory tolerance, not always avoiding overwhelming situations - finding strategies and coping mechanisms to deal with them (and difficult people).
All I can say is for him to be himself, do what he enjoys.
Counselling helped me with my anxiety (about other things as well as what others thought), plus I spent time learning about who I am as a person and not who I became to fit in - I now know what I like doing and things that can help me fit in the world better
The below helped me to find out my sensory needs and adjustments I can do to help myself, maybe it would benefit your husband?
largely a result of living in a world set up for NTs (Neurotypicals) - why most of us suffer from Anxiety (social, performance anxiety) and trying to mask who we are
If he can spend more time with his own tribe, ND (Neurodivergent) and less in the NT world - then that may help.
But sadly we are largely living in a world that, doesn't work for us: whether that be in employment, socially or even in family relationships
Learning about himself may help (reading, some you-tube channels( - but there's little support available, other than post-code lottery of finding a support group - although there's also online meet up which may be worth exploring
