There are no route relations so far.

Tracks have been drawn (e.g. https://www.openstreetmap.org/way/893844192)

If you are knowledgeable about the tram network, you may want to add the missing route relations (one per direction + one relation with type=route_master containing the two relations).

You can get inspiration from this one (https://www.openstreetmap.org/relation/13390077 with its master relation here: https://www.openstreetmap.org/relation/13401157)