At the agency, we used to debate for a long time how to properly format headlines for recommendations until we started analyzing our database using Google Discover Trends - https://d2tr.com/. It's incredibly powerful and shows real statistics on the most viewed cards in recommendation feeds. You can enter similar topics and immediately see the structure of successful previews that have already been picked up by automatic filters. This allows you to assess the chances of a piece being published and adjust the presentation based on precise data.
