Welcome to Connect, @Cugcvang , and thanks for raising this issue.
There are several ways to add a missing road in Google Maps:
- you can add the road by yourself, on mobile or desktop. Here’s the link to the help page with the basic steps: Add or fix a road in Google Maps - Android - Google Maps Help. in the community we also wrote several posts with tips about how to better proceed. My suggested reading is: 3000+, and counting. My tips for adding roads in Google Maps.
- you can ask the local administration to do that. Show them this article for them to know how to proceed: https://contentpartners.maps.google.com/
- write a post on Google Maps Community, and share with them an official cartography, accessible online, issued by a local administration. They will escalate the issue with the team and Maps will add the road.