With YITH Multi Vendor you can turn your e-commerce store into a marketplace (a multi-vendor platform) like Amazon or Etsy. Turn your e-commerce store into a marketplace (a multi-vendor platform) and earn commissions on orders generated by your vendors.
Just make sure you install and activate both plugins and the “Composite product” type will also be available to your vendors.
For more information on how to add a composite product, check the full documentation here.