I discovered this rather organically. My chef lost their nose to it being shattered. I saw the aesthetic nose and gave them that. Eventually I realized that the gastro-analyzer was also a nose-like option. Once made, I realized I couldn't install it, so I checked this wiki page. I tried removing the aesthetic nose, and noticed that the shattered nose was in the pawn's health tab, and that the gastro-analyzer was still not able to be installed (despite it being able to be installed in a pawn with an in-tact nose.) Either there is a unique injury to my chef pawn's nose, or this was patched at some point.
I would have liked to attach this as an edit reason, but that was not an option.