No you can’t do this. And you probably shouldn’t do it even if you could: just from a logical and management perspective.
If you are looking to stretch across K8S clusters for DR reasons, look into something like Replicated Event Sourcing. If you are looking for some other reason, there’s almost certainly a better architecture than trying to stretch an Akka Cluster across K8S clusters.
Fundamentally the nodes in an Akka cluster need to directly communicate with each other and be on a single reliable/fast network. Because of that need to directly communicate with each other, the only way to build a “stretch” Akka cluster would be to connect the K8S clusters with something like Submariner.
But if you are on a single reliable/fast network, I can’t really think of any reason deploying Submariner would be worth it instead of just combining the two K8S clusters into a single cluster.
I’m spending more time thinking about this question than I should because it’s intellectually interesting, but it boils down to the that fact that the only cases I can think of where it would be physically possible to do so, there would be no logical benefit.