In the Cost Estimation report, you can view all the BoM (Bill of Material) defined for the stock item.
Gateway of Tally > Display More Reports > Statements of Inventory > Cost Estimation.
Alternatively, press Alt+G (Go To) > type or select Cost Estimation > and press Enter.
Select Primary or the stock group under which the stock item has been created.
Press F8 (All BoM). All the bills of material defined in a stock item will be displayed.