nargül wrote:
But how could it be? Photos should not be deleted after backup.
How did you back up the iPhone? To iCloud? To a Mac or PC? Maybe as part of moving to a new iPhone?
Are your photos possibly in iCloud Photos? Log into iCloud.com using your Apple ID, and check there.
If you were using iCloud Photos, did you also first delete some of the photos to save some space?
Did you happen to change Apple IDs as part of whatever backup you were performing?
If the answers to the above point to a resolution, and if there are no other backups extant, then the photos are gone.