Open the Photos app
Tap Albums
Scroll down and tap Recently Deleted
Use Face ID, Touch ID, or your passcode if prompted
Select the photos you want to recover
Tap Recover
Confirm by tapping Recover Photo
Check iCloud Photos if the photo is not in Recently Deleted
Sign in to iCloud.com and open Photos
Check other backups such as iCloud Backup or a computer backup
Restore from a backup if the deleted photos are not available in Photos or Recently Deleted