Read STEP File into TopAbs_FACE

Hello Open CASCADE Community,

I require to import a STEP file with separated "faces" of all sub shapes. Code snippets are below:

 TopoDS_Shape sub_shape;

        XCAFDoc_ShapeTool::GetShape(referred_label, sub_shape);
        if (sub_shape.ShapeType() == TopAbs_COMPOUND  || sub_shape.ShapeType() == TopAbs_COMPSOLID
                || sub_shape.ShapeType() == TopAbs_SOLID || sub_shape.ShapeType() == TopAbs_SHELL
                || sub_shape.ShapeType() == TopAbs_FACE || sub_shape.ShapeType() == TopAbs_WIRE
                || sub_shape.ShapeType() == TopAbs_EDGE || sub_shape.ShapeType() == TopAbs_VERTEX) {
            BRepBuilderAPI_Transform transform(sub_shape, local_location, Standard_True);
            Handle_XCAFPrs_AISObject object = new XCAFPrs_AISObject(referred_label);

            if(sub_shape.ShapeType() == TopAbs_COMPOUND){
                std::cout<<"sub shape is COMPOUND!"<<std::endl;
                meshes.emplace_back(TopoDS::Compound(transform.Shape()), full_name, mesh_id_, object, local_location);
            } else if(sub_shape.ShapeType() == TopAbs_COMPSOLID){
                std::cout<<"sub shape is COMPSOLID!"<<std::endl;
                meshes.emplace_back(TopoDS::CompSolid(transform.Shape()), full_name, mesh_id_, object, local_location);
            } else if (sub_shape.ShapeType() == TopAbs_SOLID){
                std::cout<<"sub shape is SOLID!"<<std::endl;
                meshes.emplace_back(TopoDS::Solid(transform.Shape()), full_name, mesh_id_, object, local_location);
            } else if (sub_shape.ShapeType() == TopAbs_SHELL){
                std::cout<<"sub shape is SHELL!"<<std::endl;
                meshes.emplace_back(TopoDS::Shell(transform.Shape()), full_name, mesh_id_, object, local_location);
            } else if (sub_shape.ShapeType() == TopAbs_FACE){
                std::cout<<"sub shape is FACE!"<<std::endl;               
                meshes.emplace_back(TopoDS::Face(transform.Shape()), full_name, mesh_id_, object, local_location);
            } else if (sub_shape.ShapeType() == TopAbs_WIRE){
                std::cout<<"sub shape is WIRE!"<<std::endl;
                meshes.emplace_back(TopoDS::Wire(transform.Shape()), full_name, mesh_id_, object, local_location);
            }else if (sub_shape.ShapeType() == TopAbs_EDGE){
                std::cout<<"sub shape is EDGE!"<<std::endl;
                meshes.emplace_back(TopoDS::Edge(transform.Shape()), full_name, mesh_id_, object, local_location);
            }else if (sub_shape.ShapeType() == TopAbs_VERTEX){
                std::cout<<"sub shape is VERTEX!"<<std::endl;
                meshes.emplace_back(TopoDS::Vertex(transform.Shape()), full_name, mesh_id_, object, local_location);
            }
        }

However, all of subshapes are SOLID (i.e. TopAbs_SOLID). Some sample step files are attached this post. Can you see where I went wrong and why it only imports solid shape from the code? If I can parse it as a face, then I will show the vertex points with the mouse selection and I will choose what I want them. So I need to acquire the faces separately.

Thank you in advance!