Those are likely to be the ones stopping at AML. I think there may be more missing on Xbox than that though.
The devs need to add tfl trains as according to the gwr ( i emailed them and asked) their trains no longer service acton main line
The route is set in a specific time period, it doesnt reflect what actually is operating on the route. If they add a Loco DLC to it at some point it will be a fitting one for the time period they have choosen for the route when they created it.