Thanks for your question.
Yes, it’s possible.
Please find details below-
You don't have to include all the tables that are in a database in a sync group. The tables that you include in a sync group affect efficiency and costs. Include tables, and the tables they are dependent on, in a sync group only if business needs require it.
Please note, each table in a sync group must have a primary key. SQL Data Sync can't sync a table that doesn't have a primary key.
Also, This article https://learn.microsoft.com/en-us/azure/azure-sql/database/sql-data-sync-update-sync-schema?view=azuresql introduces a solution to automatically replicate schema changes to all SQL Data Sync endpoints.
1. This solution uses a DDL trigger to track schema changes.
2. The trigger inserts the schema change commands in a tracking table.
3. This tracking table is synced to all endpoints using the Data Sync service.
4. DML triggers after insertion are used to apply the schema changes on the other endpoints.
Let us know if this helps!
Thank you!