Tracing for non-HTTP connections

I have tracing enabled and sending all spans, etc into a Grafana Temp instance. While I see the spans for all HTTP/HTTPS traffic, I don't see anything for non-HTTP traffic.

For example we have Traefik setup to ingress into Postgres instances. The ingress works perfectly, but I am not seeing any spans showing those connections. Is that just a currently limitation of enabling tracing or did I possibly not enable something for non-HTTP traffic?

I am currently using version 3.1.0 if that helps.

Thanks for the help!