how do you easiest copy and or transfer a massive amount of pictures and videos from one icloud user to another icloud user? when logging into "data and privacy" site it seems you can only transfer it to a google photo account and not another icloud account.
iPhone 13, iOS 16
See the article View, share, and print photos on iPhone - Apple Support
Upload photos and keep them up to date across devices
Use iCloud Photos to upload photos and videos from your iPhone to iCloud and then access them on other devices where you’re signed in with the same Apple ID. iCloud Photos is useful if you want to keep your photos up to date across multiple devices or save space on your iPhone. To turn on iCloud Photos, go to Settings 
> Photos.
See Share photos and videos on iPhone - Apple Support
See the article View, share, and print photos on iPhone - Apple Support
Upload photos and keep them up to date across devices
Use iCloud Photos to upload photos and videos from your iPhone to iCloud and then access them on other devices where you’re signed in with the same Apple ID. iCloud Photos is useful if you want to keep your photos up to date across multiple devices or save space on your iPhone. To turn on iCloud Photos, go to Settings > Photos.
See Share photos and videos on iPhone - Apple Support
Transferring a large number of photos and videos directly between two iCloud accounts isn't a built-in feature. You can create a shared album or explore third-party apps for potential solutions. Ensure you have the necessary permissions and consider data privacy and security. Refer View, share, and print photos on iPhone - Apple Support Power BI Training
how to share photos with other icloud user
