does relevanssi work with multi-vendor plugins?

How does this work in WP terms? Are stores users and authors of the products? If that’s the case, then this is fairly straightforward.

You can use the relevanssi_hits_filter hook to go through all the posts in the results. You can take the author of each post ($post->post_author has the author ID), store it in a global variable and then display that list the way you want on the search results template.

Thank you very much for your quick response. I see that relevanssi is more oriented to programmers and not to the common user, who are far away from having to do everything by code.

95% of Relevanssi use cases work out well without code, but the rest is built with developers in mind, providing very comprehensive coding support. It’s impossible to provide no-code solutions for all possible fringe cases, especially as what you want here is something that goes beyond the scope of Relevanssi – Relevanssi couldn’t modify your search results template in any case, so either it takes code or your theme would have to have this feature built-in (it could, with or without Relevanssi, so perhaps you can ask your theme’s developers to add this feature?).

If you are interested in getting this feature, consider hiring a developer – a skilled WP developer should be able to do this in 30 minutes.