Never owned an iPhone, but I have familiarity. Here's Apple's instructions for "exporting" your photos from iPhone. Note: it does not say plug the iphone in and drag the photos from the "Photo" folder to your external device. It says this:
> Export photos and videos to an external storage device
> You can export photos and videos you took on your iPhone directly to an external drive, a memory card, or other storage device.
> Note: For photos and videos that have been edited, the unmodified original version will be exported.
> Connect your iPhone to the storage device using the Lightning or USB-C connector, or connect the device directly to your iPhone.
> Go to the Photos app on your iPhone.
> Select the photos and videos you want to export.
> Tap the Share button, then tap Export Unmodified Original.
> Tap your storage device (below Locations), then tap Save.
Note that you have to request permission from Apple's app before you can actually export the data. The filesystem doesn't gate you this way.
https://support.apple.com/guide/iphone/import-and-export-pho...
So here's a question: can you export modified versions of photos that have been edited? Well, that seems to be tough. Searching around, you find wild discussions like this: https://discussions.apple.com/thread/8567773?sortBy=rank
This is the kind of shenanigans I'm referring to. No access to just copy data from the app. Android has a similar issue with apps, but at least the filesystem is a first class citizen on Android. That is, I can simply copy any photos directly off my phone like it's USB mass storage.