Dears, as per my knowledge the feature to have Sub-vendors related to a main vendor not possible in Business central.
I got this request from one client:
Vendor Name: Hyper Market Inc. | Vendor Type: Main
This vendor has 10 vendors under the same company [Hyper Market Inc. Branches ] but we deal with each sub-vendor separately but sometimes the Main vendor asks to provide a consolidated Statement, as well as the Payments some times he requests to pay to a specific sub-vendor.
Summary: Vendor 1 Main has 10 branches [different legal entity], sometimes we deal separately & sometimes consolidated
Thanks