Maybe you're thinking of BlueChi[0]? It used to be Red Hat project called 'hirte' and was renamed[1] and moved to the Eclipse foundation for whatever reason. It lets you control systemd units across nodes and works with the normal systemd tools (D-bus etc).
[0] https://github.com/eclipse-bluechi/bluechi
[1] https://www.redhat.com/en/blog/hirte-renamed-eclipse-bluechi