I though it was ok for a real-time indicator. Question is should real-time auto-scroll? Ideally I think the line should be more like a cursor for latest seen post - all new will be above.

Is it possible to show the number of events loaded out of sight (above), where you don’t need to click show more (which scrolls to the absolute top) and you just scroll past the current latest marker to see new content?

Tweetbot did this and it works well. The new count was a smaller bubble test shown top right only when new content was above your current marker.