Couple of configurations I would check..

1.Is the vendor identified as a subcontract vendor for the product?

2. Does the receipt created from the PO have the option to record component consumption? This differentiates a PO from being a Buy to a subcontract

Please install the app “Purchase and Subcontracting Management” manually, as it doesn’t always install automatically. The same issue occurs in version 19 as well.

Hi,

Please refer to the link:

1. https://www.youtube.com/watch?v=guRAQ0v81sc

2.https://www.cybrosys.com/blog/how-a-product-is-subcontracted-with-odoo-18

Hope it helps.

Did you manage to solve this in the end? In case it helps, I hit the same issue and for me the problem ended up being that I had enabled the "Resupply subcontractor on Order" route on the top level finished product, rather than the component products.

@Jaideep

1. Yes, the vendor is identified on the product page: 

2. No, the receipt does not have that option:

It sounds like the issue could be linked to how the subcontracting routes or components are configured in Odoo 18. The “Resupply” button usually appears only when the product has a proper subcontracting route and bill of materials connected to it. I’d suggest checking if the vendor location and components are correctly linked in your setup. Sometimes re-saving the purchase order after updating the route settings can also make the button visible.