Add Folder or Library to Favorites Link
To do so, browse to the folder which you want to be added to this section. Next right-click on Favorites in the left side navigation pane, and click on Add Location in Browser to Favorites. Alternatively, you can also use the drag and drop method to do so or re-arrange them.
How do I restore Default folders in Windows Library?
To restore the default libraries on Windows 11/10, This is how you can restore default libraries on Windows 11/10. Go here to know how to add Network Location & other non-indexed locations to Windows Libraries.