My guess is you first make parallel tracks and tracks which will have a station you keep short. Snap first station, then extend the tracks in the middle, and lastly snap another station.
“Note: the bus stops on both sides are for transporting people from one side to another.
Unfortunately there is no way to have people walk underground from the left to the right station.”
Well yes, but that’s visual only 😉 just the information above the station will include multiple stations
The passengers will still exit at the building on the side of the station.
So if they need to get to the other side, they’ll either take the bus or walk