How to recover workbooks, data sources, or projects deleted from Tableau Server or Tableau Cloud using the Recycle Bin.
From the Home page, expand the side pane, and then select Recycle Bin.
For Content Type, select Workbooks, Projects, or Data Sources.
Select the More actions menu for the content that you want to restore, and then select Restore.
Select a project as the restore location.
Select Restore.
Reference Article: https://help.tableau.com/current/pro/desktop/en-us/recycle_bin.htm
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