Now that you mentioned it, I updated to the latest Waze version on my phone after your first reply and voila, east/west cams showed up. North/south are still missing on my end.
The other two cameras aren’t displaying because they aren’ t mapped (you can see this in your image). I have reached out to the Oregon editors, including the one who mapped the east/west cameras, to see why the two weren’t mapped. The PD page doesn’t say one way or the other and street view is not quite current enough.
I think I figured out where my confusion came from.
I went back to the intersection and took a much closer look at the camera placements. There are indeed four camera units, but they’re all installed along SW Walker Rd, with two on each side of the intersection. I didn’t see any cameras positioned to monitor northbound or southbound traffic on SW Cedar Hills Blvd.
My screenshot shows the approximate locations of the four cameras (red dots). The dots are just rough placements to indicate where I found them.
It looks like I mistakenly assumed that four camera units meant all four approaches were enforced. Sorry for the confusion and for sending us down the wrong path.