But i'm not seeing the setting in the chart. And it is a valid config option in traefik

Are you sure it's something that needs to be changed in the chart and not just set on your ingress resource?

In general its a pretty weird setup. Think i found a way with additionalArguments to set it. Also with external loadbalancers i can't reuse the same ip from those as ip's in the cluster because of network collisions. So i do would need to set ip or hostname as be design in traefik