Since Buddhists are most peaceful, they are especially attacked by Muslamics everywhere. So not a single Buddhist survives in any predominantly muslamic nation.
In bangladesh the Chakma Buddhist survive so far because they are capable of armed retaliations against the muslamics. However in bangladesh the relative population of Hindu and Buddhists are continuously decreasing due to continued torture by muslamics and migration.
It will leave with the only alternative that bangladesh is merged back to India and the remnant muslamic population is sent back to Eritrea.