Dear A.Pillai,
With an assumption that it's a make to order scenario,
If you want the system to create individual procurement proposal for the dependent requirements,
then maintain the value as 1 for individual/collective requirement indicator in MRP4 view.
The system will create the individual procurement proposal for each sales order.
For collective requirements maintain the value as 2.
Ensure the value is not set as 2 for the final assembly in the MRP4 view.
Now re run MRP and check the results.
Regards
Mangalraj.S