How to check and change Sync Direction in SQL Data Sync for Azure?

Azure SQL Data Sync does not allow changing the sync direction directly from the Azure portal once a sync group has been created. To change the sync direction, you need to reconfigure the sync group by deleting the current sync group and creating a new one with the desired sync direction.

After setup of azure sync group while selecting database select sync direction among Bi-directional Sync, To the Hub, or From the Hub as shown below:

For more information you can refer below links: