Hi Jay Caldwell,
It sounds like you are looking for a solution to use Google Assistant without unlocking your device. This is not specific to the Surface Duo 2, but is a setting for Google Assistant. To see if the setting is activated:
Go to the Google app (not 'Google' in the system settings) > tap on your picture in the upper right > Settings > Google Assistant > Lock screen > Enable the setting for "Assistant Responses on the lock screen". For more information, see this page: Get Google Assistant on your Android lock screen - Google Assistant Help
If you are looking for full control of your device using your voice, we would recommend exploring the accessibility options available under:
System Settings > Accessibility > TalkBack
Thank you