43t34fg4 This question cannot be answered with a simple yes or no. There are many variables to consider.
The big thing to consider is IPC. If other Google apps are installed, the Pixel Camera app can send data to those other apps via IPC. If those apps have network permission, they can then send that data back to Google's servers.
That said, is it possible? Yes. Do we know Pixel Camera sends data this way to other Google apps? No.
If you want to be super careful, either don't use the Pixel Camera, only use it in a profile with no other Google apps installed, or create a profile for just the Pixel Camera.