Don’t worry, we have provided one way to recover your deleted iPhone photos. Check this out:
Method 1: Recover Photos from iCloud Backup (if you turn on iCloud Backup)
Step 1: Visit iCloud.com on a browser and log in with your current Apple ID.
Step 2: Select Photos and browse, see if your deleted photos are there.
Step 3: Select and download your photos to the computer hard drive. Transfer them back to your iPhone later with a USB cable then.
To find out more, you can try to read: How to Recover Deleted iPhone Photos.