Glad you like it! We have loads of these for different devices. Just Google "iFixit chip ID" or have a gander at our teardowns page. Not all teardowns get the chip ID treatment but many do. https://www.ifixit.com/Teardown

I've been searching quite a bit and the only article I've found anywhere that mentions the GNSS solution for the 16e is this one:

https://www.reuters.com/technology/apple...

It claims "The C1 chips also have custom GPS systems and satellite connectivity for when iPhone users are away from mobile data networks.", which presumably was something said by one of the Apple people they interviewed.

This feels pretty significant and I'm surprised it's not more widely reported on. Bringing the GNSS and cellular solutions in-house could have significant power implications over time. Maybe not as significant as the Intel to Apple Silicon power savings, but still. GNSS and cellular chips are quite power-hungry, so having more control over these components will likely pay off in a big way in the coming years. And that's not mentioning the potential for minimization from packaging these chips together. Imagine A or M or S-series chips with integrated cell+GNSS.

Have a look at the documents at the bottom of this page. You might find the answer you're looking for in the schematics: iPhone 16e