Check the Trash/Recently Deleted folder in your Photos app
Restore the photos from the deleted items folder
Check cloud backups such as Google Photos, iCloud, OneDrive, or Dropbox
Restore from a recent device backup if available
Use a file recovery app or software if the photos are not in backups
Stop using the device to avoid overwriting deleted data
Connect the storage card or device to a computer and scan it with recovery software
Check messaging apps, email attachments, or shared albums for copies
Contact the device manufacturer or a professional data recovery service if needed