Product names in STP export thanks to luuk https://sourceforge.net/p/ifcopenshell/discussion/1782717/thread/55558229/?limit=25#a843

src/serializers/IgesSerializer.h

@@ -42,7 +42,7 @@ public:
         : OpenCascadeBasedSerializer(out_filename, settings)
 	{}
 	virtual ~IgesSerializer() {}
-	void writeShape(const TopoDS_Shape& shape) {
+	void writeShape(const std::string&, const TopoDS_Shape& shape) {
 		writer.AddShape(shape);
 	}
 	void finalize() {

src/serializers/OpenCascadeBasedSerializer.cpp

@@ -43,7 +43,7 @@ void OpenCascadeBasedSerializer::write(const IfcGeom::BRepElement<real_t>* o) {
 	if (settings.get(IfcGeom::IteratorSettings::CONVERT_BACK_UNITS) && settings.unit_magnitude() != 1.0) {
 		trsf.SetTranslationPart(trsf.TranslationPart() / settings.unit_magnitude());
 	}
-	writeShape(compound.Moved(trsf));
+	writeShape(object_id(o), compound.Moved(trsf));
 }
 
 #define RATHER_SMALL (1e-3)

src/serializers/OpenCascadeBasedSerializer.h

@@ -38,7 +38,7 @@ public:
 	virtual ~OpenCascadeBasedSerializer() {}
 	void writeHeader() {}
 	bool ready();
-	virtual void writeShape(const TopoDS_Shape& shape) = 0;
+	virtual void writeShape(const std::string& name, const TopoDS_Shape& shape) = 0;
 	void write(const IfcGeom::TriangulationElement<real_t>* /*o*/) {}
 	void write(const IfcGeom::BRepElement<real_t>* o);
 	bool isTesselated() const { return false; }

src/serializers/StepSerializer.h

@@ -36,9 +36,10 @@ public:
 		: OpenCascadeBasedSerializer(out_filename, settings)
 	{}
 	virtual ~StepSerializer() {}
-	void writeShape(const TopoDS_Shape& shape) {
+	void writeShape(const std::string& name, const TopoDS_Shape& shape) {
 		std::stringstream ss;
 		std::streambuf *sb = std::cout.rdbuf(ss.rdbuf());
+		Interface_Static::SetCVal("write.step.product.name", name.c_str());
 		writer.Transfer(shape, STEPControl_AsIs);
 		std::cout.rdbuf(sb);
 	}