If iCloud backup is enabled and Photo (iCloud Photo Library), the following were NOT downloaded after Erase All Content and Settings have been issued on iPhone 8 (iOS verion 11):

- Recent Calls - so I used iMobie PhoneRescue (screenshots below)
- Messages - so I used iMobie PhoneRescue
- Music purchased has to be downloaded manually via iTunes Store
- Apps has to be downloaded manually

But the following have been downloaded automatically, only if it was switched on iCloud backup settings on the iPhone:

- Contacts
- Calendars
- Notes

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