Hi @ryan, I’m very sorry for the delay, it seems that we lost track of this thread.
As you’ve discovered, linked documents don’t return the first or last publication dates. And unfortunately there is no way to retrieve it using GraphQuery or fetchLinks. The only way to get it would be to run a second query for that linked document.
I will let the @features-team know about this and they can add this to our feature request tracker as a possible improvement for the future.