The requirement is to publish the Header material as well as components, as planned order to ECC from APO.
Header material and components all have procurement type E, and MRP type X0.
Once published; in ECC, they will be changed to manufacturing orders or purchase orders.
For a test, I did it for header material, changed it in product view (rrp3) (from snp planned order to planned order) published it, it is showing in ECC as planned order.
However when I am changing the components in rrp3 from SNP planned orders, it is changing them to purchase reqs.