I need to trace GRPC calls in Flutter using Embrace.io.

I can succesfully manage to export the OTEL traces to Grafana but, in order to make the traces being aggregated with others, the network call should forward a traceparent header with the typical span_id and trace_id info.

Point is, it seems that from Flutter i do not have direct access to those information (which are handled lower in the stack in the specific os SDK).

I've tried to generate the traceparent header manually with no luck

Result: spans are in Grafana but totally unrelated with the backend ones.

Embrace claim to support it () and to contact them for a solution, but i didn't receive an answer yet from them.

Anyone went through the same process and willing to help would be really appreciated.