Do apps have the option to not use the photo picker? I thought from the app’s point of view, the photos that iOS shows it are all the photos on the filesystem.
The subset of photos thing was a relatively clunky addition in iOS 14. iOS 17 introduced a much better picker but devs have to opt into using it for now.
Signal[1] and a bunch of other apps do use the newer iOS 17 picker.
Limited access isn’t great UX because it’s not reasonable for users to have to manage a list of photos for every app. The new one is much better, but unfortunately app devs have to opt into it for now.
WhatsApp doesn’t use it and Apple doesn’t hold them to account over it. So, um, yay? Apps like Signal do use it.