When registry: is set at the top level of the helm chart to override the image registry for all of the components, while it is possible to further override that registry value for specific components such as the agent itself, it is not possible to override the registry that the auto-injected apm libraries use.
This is possible with a manual env var of DD_ADMISSION_CONTROLLER_AUTO_INSTRUMENTATION_CONTAINER_REGISTRY but this is not a feature available in the helm chart.
This should be added