This is one of those built-in related lists (like field histories) that you can not define a Visualforce relatedList component for.
You will need to create a custom component that reads the PartnerNetworkRecordConnection
table, filtering on column localRecordId
for the parent SObject. (That is, show only shared Opportunities on the Opportunity VF page; show shared Accounts on the Account VF page).
The actions will need to be defined explicitly using URLFOR functions to match the OOB External Sharing URLs.
I have this same issue but haven't gotten around to writing the component yet; instead, I provide an escape for authorized users to view the standard page layout (and hence the External Sharing related list)
The 'escape' is a commandLink component like this:
<apex:commandLink id="gotopagelayoutView" value="Sysad View" target="_blank"
rendered="{!$Profile.Name = 'System Administrator'}"
styleClass="somePleasingStyleClass"
action="{!URLFOR($Action.Opportunity.View,Opportunity.id,null,true)}"/> <!-- last arg is noOverride=true -->