Sorting Photos in Shared Album to Identify Duplicates

Shared albums work differently on different devices and on different OSs. Are you talking about a phone, a Mac, or an iPad, or what? You need to include more information so that we can help.

1. What device do you mean?
2. What model is your device?
3. What OS does it use?
4. Are you using iCloud Photos to synchronize your devices? If so
5. …Do you have “Optimize Storage” checked in Settings>[name]>iCloud>Photos>
6. …Do you see all your device pictures at iCloud.com?
7. …Have you checked to see if the Apple Account is really really the same on the device and at iCloud.com?
8. …What is your storage in iCloud? At Settings>[name]>iCloud>Storage, mine says 166.6 GB of 200 GB used. What does yours say?
9. What is your storage on this device? At Settings>General>device Storage, my phone says 50.5 GB of 128 GB used. What does yours say?
10. If this is an iPad or an iPhone, att Settings>Battery, what do Battery Health, Maximum Capacity, and Cycle Count say?

It will depend on your system version, if you can sort the photos in Shared Albums.

On the system versions released since 2024 or later we can sort the items in the shared albums either by the date added or the date taken. For example, on a Mac you can open a shared album and go to the View menu > Sort. If you sort the by the date taken, duplicate photos should appear side-by-side, so you can spot them easily and delete the duplicates.

It will also depend on your system version, if the photos in shared albums are taking of storage.

The photos you shared on an earlier system version - macOS 26 or iOS26 or earlier, do not count against your iCloud storage, but will take up storage on your devices. But photos you share now on macOS 27 or iOS 27 are counting against your iCloud+ storage description, and you need to have enabled iCloud Photos to use shared albums.