This article might be worth reading.
https://bythom.com/newsviews/the-future-is-ours-to-see.html
The bottom line is that there is a current disconnect between what is possible with current technology and what camera companies and mobile tech supply.
Personally, I am not expecting a USB C port on an iPhone, if announced shortly will be an instant solution. Also, my personal experience so far, is that apps developed by camera makers to integrate cameras to mobile tech have been absolute disasters terms of usability, performance and stability, so in the short term we need the likes of established third parties with large customer bases like Adobe and Capture One to develop the apps we need.
Personally, again, I would avoid solutions to transfer data from camera to mobile device based on Bluetooth.
However, I do believe we should be getting closer to the situation where USB C ports on cameras will link efficiently to USB ports on mobile devices at relatively fast speeds.
My investment in an iPad Pro was a failure as the device I purchased did not have enough storage for my typical needs. This was compounded by Apple restricting use of external storage for Apple mobile apps. For the moment, my mobile tool of choice is a decent MacAir, which allows me use Lightroom Classic and no restrictions on using raw or jpgs on internal or external storage. I also bring with me an iPhone and an iPad Pro. That combination is a lot more expensive than just simply the replacement cost of an iPhone. No matter what happens I will always be travelling with a mobile phone and hope soon that wired interfaces based on non proprietary standards (eg Lightening Cable) will allow development of fit for purpose apps and workflows. I have no experience with Android… maybe there are good options in that space.
Your original question was wise … ie does anyone have practical experience in dealing with Snapdragon. Snapdragon is an app for mobile devices based on Bluetooth for Nikon cameras. I do hope members with real world experience will reply.
The article I reference to above tallies with my own experience of woefully inadequate mobile apps designed to transfer data / images, but the potential is there and not yet effectively implemented.