Please find the blog with more details and link to resources: https://azure.microsoft.com/en-us/blog/azure-announces-general-availability-of-scaleup-scaleout-nvidia-a100-gpu-instances-claims-title-of-fastest-public-cloud-super/
The supported regions for this series are:
• US East
• US West 2
• US South Central
• West Europe
It is outlined as follows in the blog: "And today, as ND A100 v4 goes to general availability, we’re announcing the immediate availability of the world’s fastest public cloud supercomputers on-demand, near you, through four Azure regions: East United States, West United States 2, West Europe, and South Central United States."
This is the best place for finding the regions supported for a VM size: https://azure.microsoft.com/en-ca/global-infrastructure/services/?regions=all&products=virtual-machines
I have shared the feedback with the doc author and working on getting the Azure doc updated with this information.
EDIT: The document has been updated with regions supported information as below: