To some extent this was eventually solved by third party vendors laboriously creating lightning flash drives and creating an app to talk to them.
But it is definite that you cannot backup your phone. Even apple's backup method is crippled.
I would like an image backup - where you could back up every bit of phone data - but apple gets in the way of that.
But compare that to an Android phone, where I have no idea how to get access to anything more than pictures without ADB.
afaict it doesn't back up apps and app data. You can restore your phone, but the apps download again and app data is lost.
I believe this means if you are on version 10 of an app and 11 is the latest, a restore will upgrade you. And it you have say kindle books downloaded, you will have to re-download them again.
But you can also have it connect to a computer over wifi and auto-backup. Does Google let you do that?
A VM running macOS and a script. Open Photos.app and sync with ‘Download Originals’ checked. Quit Photos.app and rsync the folder ‘Originals’ out of the app bundle and onto a NAS. Once finished, reopen Photos.app.
It’s quite horrible getting the script to run as permissions get tricky with chrontab, so I used Lingon X to schedule it.
https://www.apple.com/shop/product/MD821AM/A/lightning-to-us...
But, yeah, I have lightening drives that connect directly to download pictures onto (well, purchased as a gift).. They even also have USB to be read in a computer.