I am surprised no one has replied.
I found this thread
which should help, and its not too old so info should be current.
Note, it includes one obviously unhelpful comment (wait it out) and a weird approach from someone offering to help for free): Psychologist for child Zurich area
I wish you and your child well - a qualified source of support is very helpful, first for putting things in perspective, and for providing practical helps, skills and tools. We all need help, and kids face all kinds of challenges that are hard to spot (for us), let alone articulate (for them).