diff --git a/docker/telemetry/xrpld-telemetry-mainnet.cfg b/docker/telemetry/xrpld-telemetry-mainnet.cfg
index 5a6a4ee639..4393ad398a 100644
--- a/docker/telemetry/xrpld-telemetry-mainnet.cfg
+++ b/docker/telemetry/xrpld-telemetry-mainnet.cfg
@@ -111,6 +111,11 @@ docker/telemetry/data
 server=otel
 endpoint=http://localhost:4318/v1/metrics
 prefix=xrpld
+# Sets the OTel service.instance.id resource attribute, which Prometheus
+# exposes as the `exported_instance` label. Dashboards filter on it via the
+# $node template variable, so without this every insight-backed panel is
+# empty. Matches [telemetry] service_instance_id for a single node identity.
+service_instance_id=xrpld-mainnet
 
 # --- OpenTelemetry tracing --------------------------------------------------
 
diff --git a/docker/telemetry/xrpld-telemetry.cfg b/docker/telemetry/xrpld-telemetry.cfg
index 453fe50439..a302faa2f5 100644
--- a/docker/telemetry/xrpld-telemetry.cfg
+++ b/docker/telemetry/xrpld-telemetry.cfg
@@ -109,6 +109,11 @@ docker/telemetry/data
 server=otel
 endpoint=http://localhost:4318/v1/metrics
 prefix=xrpld
+# Sets the OTel service.instance.id resource attribute, which Prometheus
+# exposes as the `exported_instance` label. Dashboards filter on it via the
+# $node template variable, so without this every insight-backed panel is
+# empty. Matches [telemetry] service_instance_id for a single node identity.
+service_instance_id=xrpld-devnet
 
 # --- OpenTelemetry tracing --------------------------------------------------