For making your site a MultiVendor, you have to use the plugin for it.
Our theme is fully compatible with the listed MultiVendor plugins and you can use anyone on your site as per your requirements.
Compatible with multi-vendor Dokan plugin.
Compatible with WC Vendors plugin.
Compatible with WC Marketplace plugin.
Compatible with the WCFM Marketplace plugin.
Further, you can follow the particular plugin documentation to set it up on your site as per your requirements.
Regards 8Themes Team.