They have an abundance of lands but a scarcity of water.
If an abundance of land could feed you sub Saharan Africans would not starve.
I believe India will surrender its consumer electronics and clothing and footwear to Bangladesh.
In return Bangladesh will procure most of its raw materials and heavy engineering from India. Even maybe military transport vehicles.
It facilitates massive economic of scale in both countries.
By 2035, Bangladesh will export 20 billion to India and India will probably export 80 billion.
That’s if Hinduvta can be controlled.
No way BD can sustain a 60 billion US dollar trade deficit with India in 2035.
40-50 to 20 in favour of India seems ok.
Also BD will never buy too much heavy engineering from India due to both quality and strategic reasons.
As for Pakistan's ability to innovate and supply specific foodstuffs to BD we shall have to disagree and anyway we should not talk about BD-India as it is off-topic!