I think timelines is a very good feature to track progress. But why does versions does not appear both on Calendar or Timelines?

Hello Zorin,

good suggestion!
There is actually a feature request to change the functionality of sprints so that they also work like work packages.
At this point, it would be possible to display them in the timelines and the calendar.

Since this however relatively complex to implement, it may take a while until it is developed.
Once this is being addressed however, it will be announced in the news.

Best,
Robin