Hello czql5v007,
Thank you for posting in Microsoft Community forum.
You can run the commands below to check AD replication status.
From the third command, you can view the replication topology, and you can try to sort out the AD replication topology yourself based on the result of the third command.
repadmin /showrepl >C:\rep1.txt
repadmin /replsum >C:\rep2.txt
repadmin /showrepl * /csv >c:\repsum.csv
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou