I have created a resource group in East US2. I am going to move “app service plan” from “East US” to “East US2.
Great. The resource is moving.
The resource can be moved but its location (region) is retained.
This time I am going to move same resource from East US to East US2 (Region transfer).
If you click ok, you will see this message;
No use. One region resource cannot be moved to another region with Move option. What it means, that you have to create your resource group, app service plan, apps domain name, application insights in a separate region.
Follow this article from Microsoft to move your resources from one region to another.
https://docs.microsoft.com/en-us/azure/app-service/manage-move-across-regions