Mendeley the free reference manager has a goup I think everyone would find useful called “Recently Added”
This would work by showing references added in a defined period (e.g., today or a period). The time frame would be set in preferences.
As a former software developer, I know this is a simple piece of programming
The advantage for users like myself is that often we add a large number of references at one session, often with the same or similar authors. It is easy to become confused or forgetful what I decided to add and what I decided to reject. The “Recently Added” group would allow the set of added references to be easily found and reviewed