Hello, Luis!
IBM RPA needs both Server and Client with visibility between them. This can be in separate or in the same machine, just keeping in mind that the Server side needs to be installed in a Windows Server machine, if you are talking about Windows On Premises platform.
For OCP and SaaS, Server is on OpenShift or Cloud, respectively. In this case, you only need the Client instance installed on a Windows machine (can be W11, for instance). But you still need it to be connected to the Server.
Once published the Scripts, you can access the Control Center from anywhere to manage your environment.
Hope that helps :)
------------------------------
Antonio Garcia de Campos Junior
------------------------------