Thank you for reaching out, actually you can report a missing road. You can try to follow the steps here Report an error on the map where it provides in details on how to do it from different devices.
There’s no any steps for report the missing roads actually. After step 4, I see the map and click on the road in satellite mode. Then the app choosing the nearest existing road suggesting me to edit it.
Please release an update. We can’t wait for this feature on iOS!
Thank you for sharing your concern with very detailed information, now I clearly understand the issue.
If you think there should be another additional feature to be added on Google Maps, I suggest you to share it with us on the Idea Exchange section. That way your idea might be helpful for the other Local Guides.