Hi Franklin,
I would frame this more as a conceptual limitation than a tooling one.
Network devices mainly expose operational state and traffic statistics. Even if they can emit metrics via OpenTelemetry, OTEL works here as a transport layer, not as true observability telemetry.
Without native tracing and context propagation, this remains network monitoring or analytics, not observability in the strict sense used for distributed systems.
Observability applies far more naturally to the services running on top of the network than to the network itself.
Regards,