Yes. It is not quite correct to translate “kaya” as “action” (especially regarding the five aggregates.)
- “Kaya” in reference to the five aggregates almost always refers to those aggregates.
- This is a bit complex issue. I hesitated to comment on this. But as we know each aggregate, (for example the rupa aggregate) includes ALL past, future, and paccuppanna rupa ever experienced.
- See “The Five Aggregates (Pañcakkhandha)“