KiCad: "No footprint for automated placement"
Pick and place, and thus the *.pos file, is relevant to surface mount technology. The automatic placement of through-hole technology is not something that is worth the money to invest in due to the volumes produced. The problem with leaded is the need to position each leg for each hole.

If you place an test surface-mount component, you will see a *.pos file can be generated as there is x-y coordinates that makes sense for such a part.