Hello,
Do you have Civil3D connector?
Hey @Ivan_Stratiichuk welcome to the Speckle community.
We do indeed have a Civil3D connector. Together with AutoCAD which it shares a lot of behaviours.
To install the connector on your machine you can do so first by installing Speckle Manager and from there the Civil3D connector.
You can learn more about our connectors and view tutorials of their use and read the user guides.