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