Hi there,
Thank you for reaching out to us.
Currently, MultiVendorX Pro includes an Invoice & Packing Slip module. With this feature, invoices and packing slips are automatically generated for the admin, vendor, and customer after a product sale, containing all the relevant details. You can learn details about the module from here https://multivendorx.com/docs/knowledgebase/invoice-packing-slip/.
However, the specific workflow you’re referring to is not supported by default at the moment. Additionally, we do not have any pre-built custom code available for this particular customization.
To achieve your desired functionality, custom development would be required on your end.
If you have any further questions please do let us know, we will be happy to assist you.