Is there a way to run "websocket" only mode with Socket.IO on this Arduino library ?

I made a local Socket.IO client that works well with the WebSockets_Generic Example "WiFiNINA-->WebSocketClientSocketIO_NINA" - but only if the server has "transport=["polling", "websocket"]," defined.

If I change the server to "transport=["websocket"]," then it does not work anymore.

However, our application absolutely requires "websocket only" configuration !

On other Socket.IO clients there is a possibility to force to "websocket only".
For example in the iOS-client there is a config setting called ".forceWebsockets(true)," that makes exactly that.

The keyword, I think, is called "websocket only". Please refer to the Socket.IO documentation here and the error you get if websocket only is missing is explained here

Is there a "websocket only" mode for the WebSockets_Generic library ?
If yes, how would I configure it ?