Hi! I would like to change coredns settings. When I change configmap in cluster it works as expected, but there is info "This ConfigMap is managed by Helm app rke2-coredns;" Where should I change it so that the settings are not overwritten?

Helm applications are managed by the cluster's side menu --> Apps --> Installed Apps. You'll need to find the relevant chart settings that controls the resource in question and then apply it by

Updating

the helm app

But it's Rancher CoreDNS helm... probably installed when I created k8s rke2 cluster. I found this https://www.suse.com/support/kb/doc/?id=000020115 but doesnt seem to work

that article does look exactly what you need, you may get better results asking in #rke2 and let them know the exact error/issue you're hitting with the instructions