How to execute raw SQL query in OpenSearch .Net Client

Describe the issue:
I know that we can write DSL queries to search OpenSearch. But for some reason, I need to execute some raw SQL queries to get the result using the dotNet client. I can execute the raw query on DevTool in the OpenSearch Dashboard but I need to execute this from the .Net Client.

POST _plugins/_sql
  "query":"""SELECT * FROM bookmark_questions WHERE studentId = 5"""

[Note: This is just a sample query.]

In ElasticSearch, it’s possible. Link.

var q = new QuerySqlRequest()
   Query = req,
   Format = "json"
var resp = await _elasticClient.Sql.QueryAsync(q);

But in Opensearch, I couldn’t do that. How can I execute this type of query?