Timetables are one of my bugbears about TSW2020. I've played Hellfire (haulage bashing) and various signalling/Rail Traffic Control sims over the decades. I can't think of any exception where a timetable look-up isn't available. DTG may say that the are available from third parties, but for a sim that is stated to be an "immersive environment" as a cornerstone it just removes you from the game itself if you have to refer to another device for timetable information. Can some form of timetable look-up be made available in-game, please? Appreciate it might be too much to ask for working Passenger Information Displays at stations... After all the 'Countdown' displays (if they still have the same?) on London Underground never seemed to be that accurate anyhow.
You do realise the timetable mode is literally the only selling point. If you dont like then purchase TS1 (which has no timetable mode).