Thank you for asking this question in the support community. I'm not certain, but based on your description, I believe you are inquiring about link aggregation with the Activchassis feature. The Link Aggregation Control Protocol (LACP) in AOS guide should answer your question:
A Port Channel may not be divided between switches; all ports of a Port Channel must physically reside on the same switch (unless in ActivChassis mode).
I hope that makes sense, or is related to your question, but please do not hesitate to reply to this post with any additional information or questions. I will be happy to help in any way I can.