Changing Azure Resource Group location

You can't change the location of a resource group.

It wouldn't matter where your resource group is created. It is just a logical container of resources inside it.

Your resources inside a resource group need not be in the same region as that of the resource group. They can be in any region where the resource is supported.

You cannot change the location of the resource group, also moving a resource only moves it to a new resource group. The new resource group may have a different location, but that does not change the location of the resource. You could refer to Move resources to new resource group or subscription for details.