No, that’s not true at all. There’s been a Files app in iOS since iOS 11 (which was released in late 2017 and allows you to store the data on device or on the c

No, that’s not true at all. There’s been a Files app in iOS since iOS 11 (which was released in late 2017 and allows you to store the data on device or on the cloud, including creating folders), and before that there was iCloud Drive. Either of these could be used to save the file. The share sheet on iOS also exposes other apps that the user has. So for example, if someone has the Dropbox app, it can be used as a destination to save files.