When I go to chrome://inspect?tracing and click tracing next to the Nexus 5X header, it goes to chrome:/tracing and I record two traces.
One where chrome is sitting idle and one where I navigate to several websites. Under interactions both read idle the entire time. I use the 'web developer' option which contains top level, so that should be enough to populate interactions, correct?

I am not really well practiced in reading chrome traces, so I cannot really dig into it deeper to tell what is going on.