If a page has multiple new incoming links from other pages, the Echo UI notification provides the name of one of the other pages, and offers the user to look at special:whatlinkshere. It does not provide the names of all of the pages it is referring to.
I dont find that offer very helpful, as I typically want to review the changes made to the linking pages, as is quite easy when the notification is for only one incoming link.
The workflow for one vs multiple incoming links should be roughly the same.
I appreciate the drop down notification is space limited, but maybe the special:notifications message could explicitly list all of the other pages.
Or the link which currently goes to Whatlinkshere could be changed to a new 'RecentIncomingLinks' page which lists all of the pages relevent to the notification.
At the very least, I would prefer that the echo notification links to 'RecentChangesLinked' with 'Show changes to pages linked to the given page instead' to show a list of the diffs that introduced the links that I am being notified about. Unfortunately that link to RecentChangesLinked would include a other changes, but it at least sends me to a page where I can determine what the notification was about.