I got a request/question from an editorial team to add a ‘Highlights’ field to articles. That is to point out a few items/lines an article is talking about, beside the abstract. An example: https://www.sciencedirect.com/science/article/abs/pii/S0143622819310781
As I was told more and more journals/publishing systems are adding this. Are you thinking about adding this feature to the OJS?