Running iOS app in the background without user interaction

Question

Hey all I’m new to the world of Xcode and building apps.

I am wondering if it were possible to have an app run in the background and have it listen to the photos library and if it finds a new photo has been added it would automatically upload that to some type of rest api call without the user having to interact/do it manually?

This will only be used in my household so I’m not looking to get it into the App Store or go through any approval process that apple does if it were going to be in the App Store.

So before I spend too much time looking around - is this possible with iOS 14+? Only thing I have come across that remotely sounds like something that would work would be this PHPhotoLibraryChangeObserver but I’m not sure if the user has to interact with it in order for it to be used or not? I’m open to any suggestions you more experienced Xcode programmers have about the above.