So while I was playing in the training center I noticed this poster which could be hinting that the UP 844 could come to tsw3 at a future date.
As a person with 0 knowledge on recognising steam trains - Google Images leads me to believe that it may actually be the BR52 instead.
The one in the poster is a Deutsche Reichsbahn DDR 52.80 Rekolok with matching Rekowagen if made for both Riesa-Dresden and Tharandter Rampe. For RRO RSN HRR SKA Main Spessart Bahn Hauptstrecke München Augsburg and Hamburg Lübeck a Deutsche Bundesbahn 052.
I agree But the necessary steam locomotives infrastructure are on the East German routes Riesa-Dresden and Dresden Chemnitz Tharandter Rampe because East Germany use steam locomotives right up to the reinification October 3 1990 unlike West Germany which phased them out from 1974-1977. For the matching Rekowagen on DR 52.80 side markings can be BW Dresden Altstadt BW Cottbus and BW Karl Marx Stadt. You actually see this on present day Dostos where they are assigned to