What external service/resource/transmittion does Commercial Edition depend on in comparison against Airgapped Edition?

According to the official documentation Understanding Plane's editions | Plane ,

Self-contained architecture All services, dependencies, and resources are bundled for deployment in restricted networks

It is too blur, Beside the way of pulling docker container images, can anyone list what service, dependencies or resource does Commercial Edition relies on? And how much portion among them is related to user data?

You can find the full architecture breakdown here.