How to move Rancher 2 out of the cluster it manages?

Hello community!
My predecessor has installed Rancher 2.3.5 and 2.5.3 to Kubernetes clusters (via rke up and cluster.yaml) and configured workloads deployment to the same clusters which is not recommended as per documentation and makes Rancher UI laggy and reloading sporadically.
I’d like to move Ranchers out of the clusters, maybe even to Docker installation for the sake of simplicity and as we don’t really need HA for Rancher.
Please advise what is my best option and how to proceed to it?
TIA