re: Unlocking iPhone without knowing security code

If you have another device you might try to set it up as a new device under her Apple ID using the backup and see what data gets transferred. https://support.apple.com/en-us/108344


Below shows how to check/recover data on some specific apps using icloud dot com, but for photos it is about iCloud Photos which if turned on the photos don’t get backed up with backup process but are on icloud dot com
https://support.apple.com/guide/icloud/recover-files-and-information-mme6182cfc37/icloud

Forgot passcode but have Apple ID and password erase/reset https://support.apple.com/en-us/105090

Afterwards set yourself up as a recovery contact or someone with an Apple device and ID - https://support.apple.com/en-us/HT212513

quote:

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An account recovery contact can help make sure that you always have access to your account, even if you forgot your Apple ID password or device passcode.

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