Magento 2 : Disable ElasticSearch, Switch Search Engine to MySql (legacy)

End of year 2023 

composer config repositories.mysqlsengine git https://github.com/swissup/module-search-mysql-legacy.git

composer require swissup/module-search-mysql-legacy –prefer-source –ignore-platform-reqs

php bin/magento setup:upgrade –safe-mode=1

php bin/magento setup:di:compile

php bin/magento cache:flush

php bin/magento config:set catalog/search/engine ‘lmysql’

php bin/magento indexer:reindex catalogsearch_fulltext

php bin/magento cache:clean