I (rather) did not hear or read about such groups.
I had diagnoses of Asperger syndrome and schizotypal disorder (F21 in ICD-10 classification) at the same time, but not AS + schizophrenia (F20 in ICD-10). My both autism symptoms and schizophrenia spectrum symptoms are rather not "typical", but I am significantly disabled. Not just mildly. I have social pension and care allowance.