Am using elastic search as the search engine. Can anyone tell me how can I extend the search suggestions in Magento 2.3.1 to add the categories in search suggestion? Any small help or clue will be appreciated. Thanks!
Native magento can search only by products.
But you can use different extension for implement search/search autocomplete for categories, cms page etc. Like this one https://mirasvit.com/magento-2-extensions/elastic-search-ultimate.html