Interplant Demand and Customer Demand

We've 2 plants connected to each other using branch relationship A & B

I'm using Multifacility in Plant A to generate interplant demand (ID) in branch plant B for semi finished goods. Plant B, also has recieve customer demand for the same item.

While using R3483, DRP program writes OT records in Plant A (Stk type P) and WO records in Plant B (Stk type M). Client do not want to process OT messages in order to retain flexibility in supply and other shipping constraints. But they wants to use ID demand signal to generate MRP requirement in Plant B.

Is there anyway we can generate these two demands ID & FCST together in plant B without processing OT order messages in Plant A? Also we're looking further to generate MRP requirement.