In reply to captain paranoia:
Mispelling = symptom of rage!
It seems models designed for EU market had that option remover due to compliance with some EU reg or other (if you believe the Google search results)
In the end I had to set up a Bixby routine, which was annoying as I hate the name 'Bixby' being applied to some software app. The routine turns on Do Not Disturb when camera is in use. Not quite what I want but it does silence the click.