I'm using opensearch and I'm getting the following error on the category page. I'm also getting a similar error during indexing.
1 exception(s):
Exception #0 (Elasticsearch\Common\Exceptions\BadRequest400Exception): {"error":"no handler found for uri [/magento2_product_1/document/_search] and method [POST]"}
I'm using brew for opensearch, the version is 2.3.0.