Yeah that's an unfortunate downside of the daemon-less design. Service management (like dependencies, health checks, etc) are outsourced to systemd since there's nothing locally available to monitor them. The fact that the documentation doesn't mention this is a major miss.

For anyone curious, there's more details on why this is tricky to do with Podman at https://github.com/podman-container-tools/podman/pull/27033 .