I couldn't see Conflict tables in replication monitor SQL Server 2008 R2 in Merge Replication
You cannot see the conflict tables from within Replication Monitor.

However, you can view the Conflict Viewer by right-clicking your Merge Publication in Object Explorer -> View Conflicts.

Alternatively, you can directly query MSmerge_conflicts_info.

For more information, see View and Resolve Data Conflicts for Merge Publication (SQL Server Management Studio) and Microsoft Replication Conflict Viewer (Merge Replication).