Thanks for your post - currently Waze only maps speed related safety camera’s. The introduction of newer cameras that monitor for non speed related events is not possible via a new icon or similar. I am also unsure whether it will ever be a feature as it’s a rather contentious subject area with varying opinions.
Nothwithstanding that I have placed a map comment on the northbound lane - presuming you mean the camera is positioned on the Bulla - Diggers Rest Rd overpass? Also what make you suggest it is a mobile phone detection device?