From a reader perspective,, especially in a mobile ui setting, it would be nice to know up front the content is lengthy and there is a TLDR at the bottom. It’s not necessary to start with the TLDR. I just find a lot of content I bail on because my initial interest level did not align with the time investment. The New Yorker style of journalism.
Executive Summary slides are my analogy. They always lead, raise a ton of questions, and the answers are forthcoming if you want to sit through the presentation. But don’t be that guy who starts drilling in with granular questions during this stage of a presentation