Check the Photos app’s Recently Deleted folder
Check the trash or bin in your gallery app
Check cloud backups like iCloud Photos, Google Photos, OneDrive, or Dropbox
Restore from a phone backup made before the deletion
Check your computer backup if you synced photos there
Look in messaging apps where the pictures may have been shared
Check email attachments if you sent the pictures
Check social media or other apps where the pictures were uploaded
Use file recovery software on the device or storage card
Stop using the device immediately to avoid overwriting deleted files
Contact a professional data recovery service if the photos are important