[ulfw]

Most of the stuff you wrote can be done with modern cameras. Canon, Nikon, Sony, Fuji et al have mobile apps with a variety of functionality depending on model. But all basically allow you to connect via bluetooth to GPS tag pictures and download them via Wifi to your phone, where you can 'directly post them to Instagram'. You can charge most modern cameras (Canon EOS R, Sony A7(R)III, Nikon Z6/Z7, Fuji XT-3(0) etc) with USB-C. Canon and Nikon have great touch screen support, Fuji so-so, Sony horrible.

I am not saying everything is perfect. But it seems you haven't done research on modern cameras.

Trying to put a whole phone stack in there isn't the core competency of any of those manufacturers (except barely Sony, though a different division). It's not just "slap a SIM and a beefier CPU" in there. Camera CPUs are highly specialised. So you'd have to essentially put another phone in there. That adds BOM cost plus reasearch and development of folks without core competency. Issues with software updates, compatibility, let alone battery life. All so you can edit a picture on a tiny 3" screen to post a 4megapixel version of a 24-45Megapixel original image directly to instagram?

Zeiss is coming out with a phone just with everything you've described. They're late. It will be huge. It will be incredibly expensive. Not sure I'd want to go that route.