Deleting an SDDC terminates all running workloads and destroys all SDDC data and configuration settings including public IP addresses. Deletion of an SDDC cannot be undone.
When you delete an SDDC, all ENIs created for it in the connected VPC are deleted and their IP addresses released. Routes added to the main route table remain, but in most cases will have a status of “Blackhole” because they point to a deleted ENI.