For any node you monitor, you can use Network Discovery to automatically add child volumes...

For any node you monitor, you cannot use Network Discovery to automatically add child volumes or interfaces for monitoring. Network Discovery is a tool that helps you identify and add new devices to your network, but it does not automatically monitor all the components of the discovered devices. You need to manually select the volumes or interfaces you want to monitor from the list of resources on each node. You can also use the Network Sonar Results Wizard to filter and add the resources you want to monitor after running a discovery job. References:

Discover your network with NPM - SolarWinds (see the Monitoring Settings panel section)

Network Discovery Tool - Automated Discovery Software | SolarWinds (see the Monitor Devices section)