Hi Ben,
Thanks for your post. Based on my research, the current available documents will show in the GitHub - MicrosoftDocs/Virtualization-Documentation: Place to store our documentation, code samples, etc for public consumption..
If you would like to recover a deleted repository, it is required that new support requests be created using GitHub's support website: https://support.github.com
For restoring deleted data use this link: https://support.github.com/contact?tags=rr-restore
Best Regards,
Ian Xue
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