Hello,
Welcome to Microsoft Q&A!
As far as I'm concerned, there is no way to launch Windows Applications using Voice Assistants.
And according to the Doc: Activate a foreground app with voice commands through Cortana:
This feature is no longer supported as of the Windows 10 May 2020 Update (version 2004, codename "20H1").
Cortana also no longer supports the feature.
Thank you.
Jeanine
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