Azure Private Link enables customers to access Azure PaaS Services (for example, Azure Storage and SQL Database) and Azure hosted customer-owned/partner services over a private endpoint in customer's virtual network.
Traffic between customer's virtual network and the service travels the Microsoft backbone network. Exposing ESDB service to the public internet is no longer necessary. Event Store Cloud can create your own private link service in its virtual network and deliver it to Event Store Cloud customers.
https://learn.microsoft.com/en-us/azure/private-link/private-link-service-overview