See this ChromeUnboxed article from 04/03/2022 called "Chrome OS virtual desks will soon add a ‘close all’ and ‘undo’ buttons" for more information.
See this ChromeUnboxed article from 01/11/2021 called "Virtual Desk Templates Will Allow You To Launch Dedicated Apps And Workspaces With Ease" for more information.
See this ChromeUnboxed article from 13/03/2021 called "Here’s how you can get the most out of your Chromebook’s virtual desks’ and ‘undo’ buttons" for more information.
See this Google Support page "Set up and manage multiple desktops with desks" for more information.