The package has not been actively maintained for several years, and last I heard the original authors have moved on to other projects and no longer support it. You may consider reaching out to them for more information. Here is the feedback thread:
Regarding nodes available in the core product, there are a handful of nodes that are planned for deprecation in the future. When placed in the workspace, they currently show an Info message with a recommendation for a replacement node (example below):
The full list of nodes planned for deprecation can be found in the documentation here.
This blog post may also be a helpful resource regarding new features and changes for Dynamo in the Civil 3D 2025.1 release.