Yes, Tablestore allows you to migrate data across regions. You can use DataWorks or Tunnel Service to migrate data.
When you migrate data across regions, make sure that the machine where scheduling tasks are executed is connected to the networks where the source and destination instances are deployed. You can use the following methods to test the network connectivity:
Use DataWorks to migrate data: Create a source for OTSReader and OTSWriter, separately and check the network connectivity between the sources.
Use Tunnel Service to migrate data: Log on to the machine that is connected to a tunnel and use cURL to connect to the endpoints of the source and destination instances. If Unsupported Operation is returned from the preceding test results, the networks are connected.
After you confirm that the networks are connected, use DataWorks or Tunnel Service to migrate data. For more information, see Data Integration and Synchronize data from one table to another table in Tablestore.