Hi Rahul
Do you have any storage location MRP area for the component? If this is the case, maybe the components are under the MRP area, not at plant level.
Also check the value set for the field "dependent requirements" on tab MRP4 of the material master.
Maybe you have any active implementation of BAdI MD_CHANGE_MRP_DATA. With this BAdI it's possible to hide an MRP element from MD04, so maybe this is the case.
Otherwise, you can take a look in debug setting a break-point on function module aufbauen_mdpsx_anzeigen, where the MRP elements are read.
The following document explains how they are read in more detail:
How to analyze the MRP elements by debugging - ERP Manufacturing (PP) - SCN Wiki
BR
Caetano