This is possibly the easiest online discussion type or "template" to implement. It is indispensable in any new or redesigned online course. I call it "see the forest discussion," but most people call similar activities "exit tickets." The interesting part is that it isn't really a "discussion" in the strict sense, but is worth considering, if you don't use it.
Online discussions in some ways they are better than traditional face-to-face synchronous discussions. They are more equitable, giving everyone time to think, and leveling the playing field for intro- and extroverts (who are always guaranteed to win in face-to-face discussions!).
Educause has this timely article that addresses the common confusion between the two different teaching formats: The Difference Between Emergency Remote Teaching and Online Learning | EDUCAUSE "Well-planned online learning experiences are meaningfully different from courses offered online in response…
"When my colleagues decided to refresh graduate-level courses for online delivery, I proposed that we should consider a simple, yet innovative and radical instructional design principle: that all course activities should not only be built using sound, published evidence that supports their potential for effectiveness, but that such grounding in published research for each activity should also be clearly articulated and made available to students!"