I passed your request on to the lemmy.world community team.

Note that !bangladesh@lemmy.ml already exists and is active. Though there is no harm in having another community on lemmy.world.

If your goal is to keep communication open during another government shutdown of the internet, then perhaps you should try to host an instance locally in Bangladesh? Lemmy.world is hosted in Europe, so if you lose connection to the outside world then a community on this instance would be inaccessible.