> In iOS, applications can use the File Provider API to present themselves in the Files app. You can move/copy/delete data there using the normal human interface constructs native to iOS, including mouse support and keyboard shortcuts on iPadOS.

> Apps can also present the same directory internally (inside the app). Cloud-backed applications can then do useful things like materialization, eviction, and dataless file presence.

In Android apps can do all this with the SAF API.

More importantly, on Android the user can give multiple apps access to the same directory, allowing apps to work together with files. iOS doesn't allow this AFAIK.