I have discovered devices in DX Netops Performance Management but don't see metrics I need on the devices.
Release : 3.7,20.2, 21.2
Component : IM Discovery
You must apply a Monitoring Profile that contains the Metric Family that
collects the metrics you need to a collection the device is in.
For a high level overview of configuring monitoring in your environment see:
The certification page has a list of what metrics are certified by model:
If you don't see the specific model if you see a similar model then yours may support similar statistics.
Additionally, if you don't see the model and/or you don't see the metrics you need, you can create a support ticket for a Certification Request, supplying the required information for certification in that ticket: