Hello,
I’ve built a custom integration to send metrics and events to datadog.
It can serve as a laboratory for ideas before improving the official datadog integration in HA.
Repository is available at GitHub - kamaradclimber/datadog-integration-ha: A better datadog integration for Home Assistant.
It does not handle logs (for which I’m using Logging to datadog)
Feedback and suggestions are welcome on the github issue tracker!