They are not mental disorders. They are neurological disorders. Big difference.
CIs do work with those spectrum, but the key question is: can the client tolerate new environmental inputs when they are already overly-reactive to their stimuli. Some can, while for others it is not a good idea... You have to do individual evaluations of these kinds of things.
Like we said, what works for one person may not work for another person. Same thing applies here.
For example, I can tolerate speech and certain kind of music, but I get bent out of shape when there is an environmental sound or sound distortion in a song. I absolutely hate it when people touch me because it's just too much for me, it's overwhelming.
For some people, smell and sight are too overwhelming, but auditory and tactile are something they can deal with.