Repadmin /replsummary may give you an idea
https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/cc835092(v=ws.11)
When it begins to collect data for the replication summary, this command displays a series of dots. Each dot represents a domain controller that is specified in the DSA_LIST parameter (plus some extra dots for preprocessing). Fifty dots are displayed on each line of the output. For example, four lines of dots represent about 200 domain controllers that are specified by the DSA_LIST parameter. The dots help you gauge throughput and completion time in large environments.
--please don't forget to Accept as answer
if the reply is helpful--