recovering photos from a lost iPhone
How can I recover photos from a lost iPhone?
iPhone 11, iOS 14
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If iCloud Photos was turned on in the phone before it was lost, you can view them in the Photos app at www.icloud.com and you can turn on iCloud Photos in a new device to sync the photos with it. See: Set up and use iCloud Photos - Apple Support
If iCloud Photos wasn't turned on in the phone but you have a backup, you can use the backup to setup a new device. See: Transfer data from your previous iOS or iPadOS device to your new iPhone or iPad - Apple Support