I'm reading through:

https://github.com/kubernetes/ingress-nginx/issues/8 https://github.com/kubernetes/kubernetes/issues/41881

But I can't seem to determine a conclusive answer. Does Kubernetes support wildcard domains in it's ingress or not? If not, what are the possible workaround approaches?

At least for V1.18 it seems to be officially suported - though still dependent on the ingress controllers also supporting it. (https://kubernetes.io/blog/2020/04/02/improvements-to-the-ingress-api-in-kubernetes-1.18/) - though I still want to know about recent previous versions as well.