Sorry some of my info repeats previous persons post, it wasn't showing in the thread when I was answering it, I had an older copy of the thread on my screen....

I checked the Bosch web site.
https://www.boschautoparts.com/en/auto
Entering my Crossfire, it was showing the 16123 and 16276 as the downstream (or post-convertor) sensors.
The upstream are 16167 and 15733.

I wouldn't swap the upstream and downstream as being interchangeable, but that's just my guess. I would guess that they might somehow operate differently, but left and right would logically seem to be functionally interchangeable.
Reading all the comments in the thread, it does seem to look like for the issue of left or right side for the same sensor, it might just be the length of the cable is the real difference for left and right.

That theory would also support the NeedsWings site only showing two sensors, not 4 different ones, and their numbers match the Bosch ones, meaning upstream ones work on either side, and downstream ones work on either side. And they have the one with the longer cable for the downstream, which would make sense that a longer cable would also work in place of the shorter cable, as long as it's not hanging down.
The Bosch site says the 16123 has a "length" of 10.2, and 16276 is 13.4, and NeedsWings sells the longer one.

Oddly enough, I just replaced my crankshaft position sensor successfully, because of a check engine code for it. A few days later the check engine came back on saying the downstream drivers' O2 sensor indicated too lean. I don't think I bumped the cable, but it seems odd that the two things happened right after one another.
So I'll be checking my cable, then doing mine in the next week or so also.