Hi!
Although currently, that needs a lot of custom code, in our next release it will be possible by implementing a window.epAutosuggestItemHTMLFilter method that receives the original HTML and gives the dev the chance to change it as desired. here is the link to the code: https://github.com/10up/ElasticPress/blob/develop/assets/js/autosuggest.js#L269
You’ll still need to index the thumbnail URL in Elasticsearch or use WP REST API to get it based on the thumbnail ID.
As we don’t provide support here, I’m marking the topic as resolved now but feel free to open an issue in our GitHub repository for further info. Thanks!
