K8s Subnet router

We have a k8s subnet that is setup to advertise routes 100.66.0.0./16
and we can successfully ping via sudo tailscale ping 100.66.200.163 a mongo service behind the subnet in the k8s cluster. But we cannot mongo shell into the cluster from the tailscale network.

I know that the subnet is activated and I ran sudo tailscale up --accept-routes on one of the tailscale machines that Im attempting to run the docker client from