SER has shortage of EMU and MEMU rakes so many trains still not restored. Some EMU locals are permanently cancelled by SER in ZBTT and remaining ones will run after rake availability. New EMU rake will come in 2022-23 to SE.
Slowly slowly rest will be restored.
Dereservation of some coaches in PRR Exp, Aranyak, Rupasi, Steel, etc train, SER is thinking on it. Will be announced soon