So, what algorithm makes a post appear in the forum overview?

[LiliMcDonald · Accepted solution]

Yes, since you have the "latest topic" component enabled for your view, you are seeing the most recently posted topic listed. This is based on the time of the first post in the topic. If you would like to see the latest updated topic, you can choose to display the "latest post" component instead.

[altenbach]

Aha, we are getting close. I did not even know about that "Home Page" setting, but I can even show both 😄