Yup. If you have 4 production data centers, I imagine they're different sizes (autoscaling groups, Kubernetes deployment scale, perhaps even database instance s

Yup. If you have 4 production data centers, I imagine they're different sizes (autoscaling groups, Kubernetes deployment scale, perhaps even database instance sizes). So just build a staging environment that's like those, except smaller and not public. If you can't do that, then I'm willing to bet you can't deploy a new data center very quickly either, and your DR looks like ass.