I wrote the following but got no response:
I assume from my span: kind is by me "client". And Operation is "ConfigurationData.find", (where this appears by me as "HealthController#index" in your case) .
And by my app, only trace from OpenTelemetry is integrated and nothing more. If other steps should be done to get back entries from this query?
Plus: pure "builtin:span_responsetime" does not work, as well, any idea, what could be the reason?
How are you instrumenting the OpenTelemetry to get the ingested traces?
If you are using the OT instrumentation, you should see a service span type on your service list... but if you look closer, they are not services, but Custom devices.
This was added to the SaaS version 1.238, https://www.dynatrace.com/support/help/shortlink/release-notes-saas-sprint-238#services-for-opentele...
not sure about Managed (found nothing on release notes)
So, if you are seeing those span services on your env, I suggest to try the Explore Data on Build mode, instead code, to make things easy.
Or do this, to make even easier:
The span services were introduced on version 1.238 (SaaS), not sure about Managed.
You can try to update the version to get it automatically or define your own manually.
Here are the rules for the span services that is created since 1.238 version: