Permanently deleted photos from iCloud.

I recently had to system restore a work iPhone that was linked to my personal devices and iMac. As a result when it deleted my photos that had automatically downloaded to all my devices including my work phone it deleted all photos from all of my devices including iCloud. I had over 10 years worth of photos and videos stored in iCloud, memories very important to me. However when I tried to restore from backups in iCloud they have all vanished. It is still within the 30 day period for restore, but I can’t see the files anywhere. How do I restore my photos from historical backups, and isn’t this exactly why we have iCloud for disaster recovery and storage? Someone please help!!!!!