I think so. But portainer may have more features. podman-compose is not officially developed by the team that develops Podman, so it is not exactly integrated within Cockpit. But portainer has all the options, including environment variables, etc. There are guides available for installing Portainer with Podman, but I am not sure how reliable it is.
Cockpit is not for Podman only. We can even create and manage VMs with a display, if we install the required tools. Cockpit is a tool to manage a headless server, like storage, updates, services, etc.