In Ellipsis articles and Goldfish videos, the users can attach related content to display along with the main content. In Anglerfish there is no such field to attach related content.
Here's an example of how we would use that on the front end:
https://www.inquirer.com/about/a-look-inside-the-philadelphia-inquirers-toxic-city-investigation-20190409.html?/
Is this on your roadmap yet? It's enabled in Video Center, Photo Center is lagging.
This is a very common use for Galleries (attaching to a big story) and would really help us too