The relatively new Node graph visualization can't be used with any datasource, even if you select the data to fit the model of the two nodes and edges data frames, because it needs a special meta property to work.

EDIT: it seems it is no longer the case, I will test it :

https://github.com/grafana/grafana/pull/35163/files#diff-148...

Also it would be nice if an embedded panel could select its own time range.