Any chance one could parse a bunch of selected LOP nodes to TOPS, either by python or by some node, or does it need to be specifically connected/fetched? Just getting my feet wet with TOPS so excuse the noob-questions.
You can use the Node Pattern to create a work item for each LOP node that matches a particular pattern, and then use a USD Import to load attributes from them. Or alternatively, a ROP USD Output to write out a .usd file for each matching node.