Partially reconstruct manifests in the event you lost them but still have actual deployment pods running.
Here is how you can partially reconstruct the deleted manifests to make sure your provider will keep monitoring them, withdrawing from their leases as well as allow users to re-send their deployment manifest (without redeploying) to restore it & their ingresses (uri's), avoiding the Pod restart, hence keeping the ephemeral data on a Pod.
1. Partially reconstruct missing manifests
This reconstruction is based on existing namespaces, there is no way to entirely reconstruct the manifests unless they were manually backed up.