Is your feature request related to a problem?

• The new engine fetches a default size of index from OpenSearch set by this setting, the default value is 200. It is a blocker for ML plugin to pull more data by using PPL.
• Cursor only support in V1 engine. . We should support it in V2 engine.

What solution would you like?

• add pagination support for operator which will unblock ML plugin use case.
• add cursor support for V2 engine.