If you have used some cloud storages such as Google photos and Dropbox, it will be super convenient to retrieve pictures from trash of such cloud drive. Next, I would take Google photos as an example to illustrate how to recover deleted photos from Samsung Galaxy Note 8.
1.Open Google Photos and tap on "Trash".
2.Select the deleted items that you feel like recovering.
3.Finally tap on the recover button at the upper right. Finished.
Note: Items in trash of Google Photos will be permanently deleted after 60 days, while Trash of Dropbox is only available in the webpage version and saves photos only for 30 days.