As an update, similar problems were mentioned about three years ago with 6.7 and the solution was to install Windows 10 with BIOS instead of EFI.  I set up another VM with an RTX 2060 Super and everything the USBC port on the video card worked fine.  With the recommended changes to the Nvidia driver (max performance) the mouse and other USB devices work fine.  The VM boots fine, even with USB devices attached.  So perhaps that is the issue...