Forecast-Based Planning with PIR from BOM

Hello,

I work on forecast directy upload on material master data, my MRP type is VV. My client say: I want to create bunddle (BOM) with a products set. I want to do my forecast on the header, so the bunddle, and the components are extra calls off. So the total is the clasic forecast + the material as component

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As I am not on Deterministic planning planing, the MRP doesn't see the material on BOM as an extra need. I should cover my total requierement by the forecast but the business here doesn't work that way. They want to separate both of them.

I see my componant on RESB table, but no add to the forecast Is there any trick to generate PIR, planned order or better like purchase order

thanks for your input in advance Arnaud