How do I access all of my documents and photos in iCloud?

On an iPhone or other iOS device, iCloud is designed to be viewed by using the apps on the device (e.g., the Files app for iCloud Drive, the Photos app for iCloud Photos, the Notes app for notes, etc.).

You can also use an internet browser on a computer and log into icloud.com.

Also note that while you can view synced data as described above, it is not possible to view the contents of an iCloud Backup. You can only use the backup to do a full restore of a device or to setup a new device.

The following may also help: https://support.apple.com/en-us/HT204247