How Do I Use iCloud Backup
How Do I Backup My photos From my Old phone to My New phone
What does iCloud back up? - Apple Support
iCloud backup doesn’t include information that are synced and stored in iCloud, like Contacts, Calendars, Bookmarks, Mail, Notes, Voice Memos, shared photos, iCloud Photos*, Health data, call history, and files you store in iCloud Drive.
*-If you had turned on iCloud Photos, your content is automatically stored in iCloud.
Restore your iPhone, iPad, or iPod touch from a backup ...