It's a request to include Indian Rail Routes especially the route from Castle Rock station to Vasco da Gama station with Dudh sagar waterfall on its way. There is also Konkan railway. It has a scenic route from Mumbai to Mangalore. There are also many other beautiful routes in Indian Railway.
The possibility of an Indian route was discussed recently in another thread. Desirable as it might be, there are probably just too many practical and logistical hurdles for a UK based developer to overcome in doing such a project. Not the least Covid which is likely to see travel to/from India banned or restricted for quite some time. Even in happier times, DTG would need to be sure of the financial return from an Indian route before incurring the cost of sending people to do research, acquiring licensing etc.
