It does exist, I have an app that manipulates photos and if you reject photos permission you can still use the photo picker and get access to one photo of the u

It does exist, I have an app that manipulates photos and if you reject photos permission you can still use the photo picker and get access to one photo of the user's choice. You can't directly save to the photos library, but you can save it via a system share sheet. Most apps don't make that obvious though, and imply that they need full photos access to work (Or they don't give options to use the system picker/system share sheet.)