To have Odoo automatically create manufacturing orders for the sub-products when you create a reordering rule for the final product, you need to set up a bill of materials (BOM) for the final product that includes the sub-products as components.

Here are the steps to set this up:

1. Go to the "Manufacturing" app and select the "Bill of Materials" menu.
2. Create a new BOM for the final product by clicking the "Create" button.
3. In the "Components" tab, add the sub-products as components and specify the required quantities.
4. Save the BOM.

Once you have set up the BOM, you can create a reordering rule for the final product as usual. When the stock level of the final product falls below the minimum quantity specified in the reordering rule, Odoo will automatically create a manufacturing order for the final product, as well as the sub-products listed in the BOM.

Note that the sub-products must also have their own BOMs set up, otherwise Odoo will not know how to manufacture them. You can create BOMs for the sub-products in the same way as for the final product.

I hope this helps! Let me know if you have any further questions

You need to create reordering rules also on the components.  If you set min / max = 0 the result will be that it creates manufacturing orders are created for the qty you need to create the final product.