Importing photos from one iPhone to another iPhone
How can I transfer photos from one iPhone to another iPhone that’s been crushed
iPhone 7, iOS 12
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Before the iPhone was damaged if photos were always synced with iCloud Use iCloud Photos on iPhone - Apple Support
And after a new iPhone is set up by signing in with same Apple ID and password ( again the photo box is is turned as on ) Set up your iPhone, iPad, or iPod touch - Apple Support
https://support.apple.com/guide/icloud/icloud-photos-iphone-ipad-ipod-touch-mm09af46cf7c/icloud