Yea my bad, i edited my comment

There likely is something that could be done. You could try raising this as an issue on their GitHub project page or wherever the devs tend to hang out.

When you click more reply, the link takes an action to make a web service call, in the case of lemmy.world, to the lemmy.world server(s). If the archived link has not changed from when it was archived and today, and the content is still accessible (e.g. not deleted or not made private somehow), then the call to load the new data should work… unless the link is being prepended by the wayback machine’s servers (I’m not very familiar with how wayback machine actual works). If the former, it’s not loading due to lemmy.world not hosting it anymore; if the latter, it’s not loading because Wayback Machine doesn’t host website’s services that it archives. I hope that helped.