After restoring a downstream cluster using the `br restore point` command, data cannot be accessed from TiFlash. What should I do?

Currently, PITR does not support writing data directly to TiFlash during the restore phase. Instead, br command-line tool executes the ALTER TABLE table_name SET TIFLASH REPLICA *** DDL to replicate the data. Therefore, TiFlash replicas are not available immediately after PITR completes data restore. Instead, you need to wait for a certain period of time for the data to be replicated from TiKV nodes. To check the replication progress, check the progress information in the INFORMATION_SCHEMA.tiflash_replica table.