No worries.
So from the D365 Bible docs.microsoft.com/.../set-up-an-inventory-status
the inventory status is defaulted on the Warehouse.
However , you can override the above by using the form Default Status

which gives you 3 options
Stock - Transfer Orders
Customers - Sales Orders
Supplier - Purchase Orders
It is not possible at standard specify the inventory Status on the Bill of Material or Formula ( if you use process).
Therefore , if you are stating that in your environment you can amend the inventory status on the formula or bill of material line , that would be a change to the standard