TYPO3 Extension "headless_kesearch" - Provides fluid templates to render proper JSON from EXT:ke_search
This extension provides integration to headless extension with "Faceted Search" (ke_search) extension.
Extension requires TYPO3 in version at least 10.4.
Install extension using composer
composer require friendsoftypo3headless/headless-kesearch
and then, include TypoScript template, and you are ready to go.