If you own a Chromebook, you must keep in mind that the Chrome OS doesn’t have a native recycle bin or a trash folder. It’s only recently that a temporary trash folder has been added to files on Chromebook. However, you must ensure that the Trash folder is enabled. Otherwise if you delete a file, it goes away permanently.
To prevent such a situation, you can back up your photos to Google Drive or external flash drives. Since Chromebooks also have limited storage, it is important to create these backups. Moreover, if your photos are backed up, you can recover them from another computer using the following methods:
Recover from cloud backups or external drives.
Recover with software such as Disk Drill.