Configure active geo-replication and failover (Azure SQL Database)
You can configure active geo-replication for Azure SQL Database using the Azure portal or Azure CLI and to initiate failover.
Add a secondary database
The following steps create a new secondary database in a geo-replication partnership.
Step 1: In the Azure portal, browse to the database [Here db1] that you want to set up for geo- replication.
Step 2: On the SQL Database page, select your database [Here db1], scroll to Data management, select Replicas, and then select Create replica.

Step 3: Select or create [Here create] the server for the secondary database, and configure the Compute + storage options if necessary. You can select any region for your secondary server, but we recommend the paired region.
For region select: West US 3

Step 4: Click Review + create, review the information, and then click Create.
The secondary database is created and the deployment process begins.
Reference:
https://learn.microsoft.com/en-us/azure/azure-sql/database/active-geo-replication-configure-portal