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It should be, yes. Essentially it addresses the last step of the manual steps where you identify the service triggers.
The lambda forwarder could be created using the Pulumi lambda module: <https://www.pulumi.com/docs/reference/pkg/aws/lambda/>
Or if totally adhering to the Datadog guide, use the cloudformation module: <https://www.pulumi.com/docs/reference/pkg/aws/cloudformation/>