At the moment, I have not seen an official answer from Microsoft.
The following arrow was found at support.office.com .
Ctrl + Alt + Shift + 3
Open the main window and place the focus in the search field.
The Sticky keys function allows you to use it alone:
Click
+ U or open Control Panel\Ease of Access\Ease of Access Center
Select Make the keyboard easier to use.
Select Enable Sticky Keys
Adjust settings: 
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