Migrating cluster created by rancher on Docker to Cluster installed on RKE

I currently have Air-Gapped Docker-installed Rancher v2.4.8 hosting a few clusters created in the Rancher UI. I created a new Air-Gapped Rancher v2.6.6 instance on RKE Kubernetes cluster and I need to migrate those clusters. Question is, After I upgrade the Docker instance, Is there any solution to migrate them? I saw an article from 2021 stating it’s not possible, But maybe there’s a way now or a solid workaround?

I searched online for solutions, But I am planning this migration ahead to avoid problems?