PLEASE NOTE: Only works with algolia/algoliasearch-magento-2 <= 3.7

This Magento 2 module makes it possible to set a debounce and a minimum character amount for Algolia Autocomplete

composer require elgentos/magento2-algolia-performance php bin/magento module:enable Elgentos_AlgoliaPerformance php bin/magento setup:upgrade 

You can set the values under Stores -> Configuration -> Extensions -> Algolia Search -> Performance Settings