The project was delayed I believe.
However the point is that DAC-CTG train travelers are largely middle class folks and they would never pay the equivalent of airline tickets for traveling this 200 Mile route which you can even cover in around an hour and a half using a high speed (not Bullet) train. Bullet train in this route is kind of unnecessary in my opinion, which needs a separate high speed track and viaduct situation (the route has been planned already and is a far more direct route that avoids Akhaura junction).
Bullet train infra on elevated viaducts are expensive to build and needs meticulous daily track maintenance which is an impossibility at this time (witness what happened in the neighbor country with their frequent train accidents). The higher the speed, the more faultless the track has to be.
Safety is wholly lacking (even with electronic block signaling which BR already pioneered in the late 1980's - I believe Ericsson was involved). That Railway signaling fiber network was utilized by Grameen Cellphone in their early days (1990's) for Digital cell tower signal transmission which rapidly spread across Bangladesh. This is long after the advent of analog cellphones in our market in the late 1980's.
You can have a high-horse showcase project and concept (like Bullet train) but the ground realities in our neighborhood (3rd world) have to match, which they don't.
We also don't have gullible voters who can be convinced with a Bullet train that we have become 1st world country.
What Bangladesh needs right now is container rail freight equipment and infra (yards and signaling equipment) and to activate these along DAC-CTG, DAC-Mongla and DAC-Payra routes (when done for Payra).