Setting in DAG

Hi;

I am using Exchange 2013 Standard in DAG configuration.  I want to know, if I configured a MailFlow rule on EX01, would this mailflow rule will be replicated to the EX02?  or any changes on EX01 will be replicated or copied to EX02?  I am wondering if my DAG working properly?

what Exchange Shell command can be used to detect the DAG replication issue of two servers?

I know one of the command is "Test-ReplicationHealth -Identity <server name>"

KW - CNE,MCSE,VCP5