Railway is professional organisation. Railway will Develop infra day by day but need to start train for passenger benefit. Railway can manage mantenance and other works from Bhagalpur for a smaller period of time.
You cannot compare Bhagalpur to Godda as Godda has started this year train services and growth is superb. Bhagalpur has more than 100 yrs of train history still ist year train development of Bhagalpur and Godda if you wish to compare then Godda is much better in performance.
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Now you will realise n. of passenger will decrease as passenger will have to opt train from Dumka, Godda like stations. Earlier they have no choice so they are taking trains from Bhagalpur. So revenue and trains tickets sales volume increased in Bhagalpur.
Actual figure will reflect post corona that which stations are coming in which category.