All, I have a stupid question; Do I still need the CivilConnection2020 if I have installed the Civil 3D 2020? The Dynamo is preinstalled. Please help to clarify.

Civil Connection 2020 is a Dynamo for Revit package so its possible to read alignments etc into Dynamo in Revit. So no need to install it in Civil.

Though i would install the Civil 3D Toolkit as this adds more Civil 3D node/features to Dynamo for Civil.