The example config mentioned in the Forwarding traces to a TempoStack instance doc doesn't mention the namespace they need to be configured and also doesn't mention the managementState which causes below error message:

Missing property "managementState".yaml-schema: inmemory:yaml(0) 

Doc link:

 https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/red_hat_build_of_opentelemetry/otel-forwarding-telemetry-data#otel-forwarding-traces_otel-forwarding-telemetry-data