Private endpoints enable clients on an Azure virtual network to securely access Azure Static Web Apps through an IP address in the virtual network's address space over a private link. This enables network traffic between the virtual network and the Static Web Apps service to traverse over the Microsoft backbone, eliminating exposure from the public internet.
To learn more about Azure Static Web Apps, visit: https://docs.microsoft.com/azure/static-web-apps/overview
To learn more about this feature, visit: Configure private endpoint in Azure Static Web Apps