Autism and selective mute

hi! jsut wonder if any of you have the same problems as my child.

My 8 yrs son has ASD. His previous speech therapist suspected he might also have selective mutism, as he speaks at home and in school but he is not able to speak in other situations at all.

But his CAMHS team looks think that no therapy is necessary for his selective mutism.

I am not convinced.

Any of you have similar case? How did you deal wtih? can I just leave it without any interventions for his selective mutism???