Questions about how to change the [iOS] Authorization Status.

It doesn't seem like there's a function that the app can it? You can change it in your own settings. But I don't think Not Determined will work and it will be Denied.

After the user grants permission, the system remembers the choice for 
future use in your app, but the user can change this choice at any time 
using the Settings app. If the user has denied your app photo library access, 
not yet responded to the permission prompt, or cannot grant access due 
to restrictions, any attempts to fetch photo library content will return 
empty PHFetchResult objects, and any attempts to perform 
changes to the photo library will fail.

This is the information from the Apple document. If you look at the first sentence,

Allow users to select user permissions The system remembers the options for future use in the app, but users can change the choices in the Settings app at any time.

I understand that it is impossible to change the code because the authority itself is the user's choice. And even if I delete the app, the downloaded app information remains on the iCloud, so that information is also there? I think it won't change.