This output indicates that each replica is running on a different node, and thus the worker role is functioning on all three nodes.

Regarding the rke2-agent, it might not be running on all nodes because the RKE2 architecture combines the control plane and worker roles in a single binary (rke2-server). In an RKE2 cluster, you typically have one or more nodes running rke2-server and other nodes running rke2-agent. However, since your nodes are running both roles, the rke2-server binary takes care of both control plane and worker functionality, and there's no need for the rke2-agent to be running separately.