The Apple brand has embraced user privacy and we see this in the current version of our operating system. Expect additional changes in the future.
After the iOS14.x and iPadOS14.x update, when you open a photo editing app you will be prompted to select photos to edit with the app or allow access to you photo library.
"If an app requests access to your photos, you can choose which images you’d like to share without granting access to your entire library. Or if an app wants to add a photo to your library, you can allow it to do so without accessing your photos. You can also choose to grant an app general access to your photos."
What if you give minimal access and then change your mind and want to edit additional ... all photos with this app? You can make changes in the Settings app. Here is the path:
Settings > Privacy > Photos > app name > All Photos
Read this page for more information on privacy from the Apple viewpoint. Including the following white papers:
