This is a "Heavily Modded" Map. Bobs + Angels + Others!
I promise there are trains <3
Side Note 1: Some of them show no "Trains" attached just wagons.
Side Note 2: If you CLICK where the train is it will show the train interface.
Side Note 3: Some trains when moving don't even show up on the tracks.
The mod is setting the not-on-map flag for the trains, which correctly hides them on the map since 0.16.29 You should conntact the mod author to fix that.
I'm an admin over at https://wiki.factorio.com. Feel free to contact me if there's anything wrong (or right) with it.