I'm curious how exactly are people leveraging Istio for multicloud at the moment? Is this via an advanced Istio feature or some other Kubernetes-related project?
You can use Istio for this already, where one cluster is the master: https://istio.io/pt-br/docs/setup/install/multicluster/share... I've never tried across cloud providers, and so I don't know if latency would be a factor, but I think in theory it could work.