Custom metric lookups for Prometheus

I have metric names specific to node names. How do I design a query to do a lookup based on node names.
I don’t want to filter my queries, I am trying to customize the metric I’m looking up.

Using data source Prometheus.

Prometheus you use label & label values filters, you can use exact match or regex filters.

This is how I’m trying to use regex in my grafana query. Should this work?

And this is the error.