If you are familiar with coding, we recommend overwriting the template parts using this doc: How to override template parts - HivePress Help Center. You can overwrite the vendor name and add HTML code to it, for example, copy the part with categories from the listing template and replace all the words listing with vendor.
Sorry for the inconvenience, but customization is beyond our support scope - it includes fixing bugs and guidance about the available features Support Policy | HivePress
If customizations are required for your site, please try customizing it using the collection of code snippets Search · user:hivepress · GitHub and other developer resources, or consider hiring someone for custom work https://fvrr.co/32e7LvY
Sorry, we cannot provide general guidance here, as this would require a detailed code review and testing, which is unfortunately not within our support scope.
If you purchased a theme or extension, please enter the license key in the forum profile settings, this will enable the Premium Support badge and ensure a 24-hour turnaround time.
Unfortunately, there is no simple PHP snippet for this, it will require advanced customization. If you are familiar with coding, we can provide general guidance. If you are not familiar with coding, we recommend that you consider hiring experts: Customization | HivePress