For what it’s worth, iOS does warn when an app has full access to the photo library for a while. E.g.:

> "WhatsApp" has been able to access your entire photo library for 6 months. Do you want to continue to allow full access?

Screenshots: https://macreports.com/app-has-been-able-to-access-your-enti...

Yes, but it's not clear to a regular user that an app can access this camera roll without a user's input.

That just tells you that it has the permission. It doesn't give you any information about how the app is actually using the permission does it?

Do you mean prompting for permission to scan local networks? “Localization” normally refers to translating an app into another language.

Sorry I meant "location", when an app is accessing gps too often, they send a notification (e.g: I get a weekly notif for foursquare)

I believe they are referring to the icon that appears in the status bar when an application is using location services (including in the background).