I tried to run the below command to check replicatin partner but no success.
vdcrepadmin -f showservers -h PSC_FQDN -u administrator -w Administrator_Password
This was First vcenter which i configured to enable the link mode.

this is second replication partner

this is the third replication partner, in third VC+PSC servers showing second and third vcenter server in system configuration.

In license tab 1st vcenter is showing all three vcenter servers
both replication partner is showing only 2 vCenter servers(replication partners)