In the latter case I would consider it a red flag if some long-deprecated tool turned up in the tech stack of a company, but there might be perfectly good reasons to stick to the former, a bunch of VMs, instead of operating a Kubernetes cluster.
I ran a small Kubernetes cluster once and it turned out to be the wrong decision _at that time_. I think I would be delighted to see a job ad from a company that mentioned both (common hypervisors/VMs, containers/Kubernetes) in their tech stack. Without more information I would think that company took their time to evaluate their needs irrespective of current tech trends.