Incorrect component name in App Insights on Azure, using OpenTelemetry

I'm using OpenTelemetry to trace my service running on Azure.

Azure Application Map is showing incorrect name for the components sending the trace. It is also sending incorrect Cloud RoleName which is probably why this is happening. The Cloud RoleName that App Insights is displaying is Function App name and not the Function name.

In my Azure Function (called FirewallCreate), I start a trace using following util method:

def get_otel_new_tracer(name=__name__):
    # Setup a TracerProvider(). For more details read:
    # https://docs.microsoft.com/en-us/azure/azure-monitor/app/opentelemetry-enable?tabs=python#set-the-cloud-role-name-and-the-cloud-role-instance
    trace.set_tracer_provider(
        TracerProvider(
            resource=Resource.create(
                {
                    SERVICE_NAME: name,
                    SERVICE_NAMESPACE: name,
                    # SERVICE_INSTANCE-ID: "my-instance-id"
                }
            )
        )
    )

    # Send messages to Exporter in batches
    span_processor = BatchSpanProcessor(
    AzureMonitorTraceExporter.from_connection_string(
        os.environ["TRACE_APPINSIGHTS_CONNECTION_STRING"]
        )
    )
    trace.get_tracer_provider().add_span_processor(span_processor)

    return trace.get_tracer(name)


def firewall_create():
    tracer = get_otel_new_tracer("FirewallCreate")
    with tracer.start_new_span("span-firewall-create") as span:
        # do some stuff
        ...

The traces show another function name, in the same function app (picture attached).

1. What mistake I could be making?
2. The component has 0 ms and 0 calls in it. What does it mean? How to interpret it?