Hi,
If you add nodes manually via SDK, right now there is no option to get the list of pollers that can be assigned to the node.
The example I provided below is for discovering nodes and all its resources. It is the mimic of node discovery and list resources in UI.
We cannot separate adding pollers (or knowing what to add) right now as it is not supported via SDK. So you have to discover the nodes and resources as provided in the example or perform the steps you described in your message and add pollers manually.