Is there any function that shows the required quantity of child items needed for the final FG?

Hello,
We are customizing the report to track excess inventory of Child Item, we have SRP1 which is same for all interlinked Item (parent and child).

Note- Same child is not used in multiple FG.

Now I need std business function where I can see the required qty of child item to produce 1 qty. of FG in multilevel BOM as well.