Look on top export destination countries and top importer countries. China and India only push their own product to Bangladesh market without meaningful buying on Bangladesh products. Top Bangladesh products destination are USA and European countries, you should instead having FTA with them, not China and India.
I would agree with India but not with China.
China is one step up the development ladder from BD and it is still able to produce garments at same cost as BD. Over this decade it will no longer be able to competitively manufacture garments and will have by far the largest garments market in the world and BD can benefit immensely from selling to it.
Last year China eliminated tariffs on more BD products so that means some 97 percent of all Bangladeshi products from 60 percent are now tariff free.
China is the next multi-billion US dollar export prize for BD.