@seongbeen Yes, servicemap is in beta stage currently. If you zoom out the servicemap your service should be visible. Since your service would not be connected to the current hotrod services, its appearing isolated. But we could show it in the same viewport.
Would be great if you can open an issue for this with your usecases for service map
SigNoz is an open-source APM. It helps developers monitor their applications & troubleshoot problems, an open-source alternative to DataDog, NewRelic, etc.