Description of the need We have added a number of great display suites type features. https://github.com/backdrop/backdrop-issues/issues/2084 https://github.com/backdrop/backdrop-issues/issues/1100
But, something that seems to be missing is the ability to add date and author information to display modes OR to access field blocks (through the layout system) for this information.
I was just experimenting with how much a site builder can modify their page with Backdrop CMS core and the inability to use existing features to move author and date information feels like an obvious omission.
Proposed solution
There would be options to arrange the author / date field on the display mode. There would be a field block for author and/or date submitted.
Alternatives that have been considered Describe alternatives you've considered. Have you seen this work in a better way in another CMS?
I have yet to look for contrib solutions.
Additional information Add any other information or screenshots that would help.

These are the field blocks currently available to users for the Post content type.

Recent comments
If choosing the Views approach you can also use https://backdropcms.org/project/eva which allows you to place the list with more flexibility.
Backlinks for Entity Reference?
Thanks. It still took a lot of trial and error for all the settings within the settings, but I eventually got it to display based on these instructions.
Backlinks for Entity Reference?
Another easy way to do this is to use the module Corresponding Entity References (cer). You would need to add an entity reference field in the authors content type pointing at the book, then set...
Backlinks for Entity Reference?