Restore my icloud photos through backups, is it possible?

maksiod wrote:

I thought that when you delete photos from iCloud, they are not deleted from the iPhone gallery. I tried it, and that was true. I deleted half of my photos from iCloud for certain reasons. The next morning, they were also gone from my phone. I was making backup copies. How can I restore my gallery?

Read here Set up and use iCloud Photos - Apple Support

Where were those backup copies you were making? Restore from there.