Explanation
Text Description automatically generated with medium confidence

Step 1: Create a proximity placement group
A proximity placement group is a logical grouping of Azure resources within the same Azure data center in order to reduce latency.
Step 2: Create an Availability Set
Create an availability set that references the Azure proximity group.
By adding the availability sets to proximity placement groups, the network latencies are considerably reduced, thereby improving the overall performance.
Step 3: Deploy SQL Server on Azure Virtual machines
Step 4: Deploy the application tier in the Azure virtual machines
Deploy the application layer VMs by referencing the availability set and the proximity placement group.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-machines/workloads/sap/sap-proximity-placement-scenarios