Open the Photos app
Go to Albums
Scroll down and tap Recently Deleted
Authenticate with Face ID, Touch ID, or passcode
Select the photos you want to recover
Tap Recover
Confirm the recovery if prompted
Check the original album or library for restored photos
If Recently Deleted is empty, check iCloud Photos on other devices
Restore from an iCloud backup if the photos are not in Recently Deleted
Restore from a computer backup if available
Use a trusted photo recovery tool if no backup exists