The issue is the data that’s being passed through isn’t geometry data - that’s why the nodes are greyed out. Text, mograph, etc all need to be converted to editable polys or something so that they come through to Notch with only mesh data (I’m not too familiar on the C4D side). Why that’s not getting through FBX/Obj/Alembic, I’m not sure. I would assume cinema simplifies its geometry when you export it, but as I said, I’m not a c4d guy so don’t know for sure. I would check the exported fbx/alembic/obj meshes in other modeling tools and see if they pick up the geometry, and if so, re-export there to see if that solves it. If it’s not coming through in other tools, then there’s something with the mesh export in C4D.
Cinema 4D primitive shapes, mograph, dynamic systems are proprietary, thus you cant import them to Notch without converting them to editable objects or baking in animations. You can however bring in lights, general animations, cameras, 3D models, texture, baked animations.