Can’t find Elasticsearch mapping configuration on my server (Magento 2.4.5 stack with ES)

I tried
curl -XGET “http://localhost:9200/your_index_name/_mapping?pretty“
and replaced “your_index_name” with the content of field “Elasticsearch Index Prefix” from the relevant back end (Stores -> Configuration -> Catalog -> Catalog -> Catalog Search) which is “elasticsearch”.

This returned an error. What gives ?