@Stroom explained it very well. But just to add, the main difference between Overwatch, Fortnite, etc (listed) vs Catan is that Catan is a board game. You have to compare it to things like Ticket to Ride, or Smallworld, Or Carcassonne or Dominion etc. I don't know about Smallworld or Dominion (or the etc) since I haven't played them in years but TtR and Carcassonne both have lobbies.
Unterforum für das alte PlayCatan Portal (nicht mehr verfügbar)/ Subforum for the old PlayCatan portal (not longer available)