does signoz support monitoring aws rds databases independently rather than via a microservice?

Which db engine are you using in rds?

postgres

Is this what you are looking for: Enable receiver -> send data to SigNoz otelcol -> analyze. https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver or https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/hostmetricsreceiver https://signoz.io/docs/userguide/send-metrics/#enable-a-specific-metric-receiver