USB live boot
Windows host
If you only want to create Windows 10 live USB then you can you use the Microsoft tool.
Otherwise...
WSL
sudo mkdir /mnt/g
sudo mount -t drvfs g: /mnt/g
If you only want to create Windows 10 live USB then you can you use the Microsoft tool.
Otherwise...
sudo mkdir /mnt/g
sudo mount -t drvfs g: /mnt/g