The government imposes reciprocity requirements for granting bank licenses, where the same provisions applied to foreign companies in their country of licensing are provided to Bangladeshi companies investing in that country and vice versa.
"Chapter II. FUNCTIONS OF BANK-COMPANY
Article 31: Bank-company licensing [...]
Sub-section 4: Fulfillment of all or any of the following conditions before granting a license under this section to inspect the documents of the concerned bank-company whether it has been done or not Bangladesh Bank shall be satisfied through or otherwise, namely – 
(a)	the company is capable of filly meeting the claims of is present and future depositors;
(b)	the affairs of the company are not or are likely to be conducted in a manner adverse to the interests of its present or future depositors;
(c)	In the case of a banking company registered outside Bangladesh, the Government or law of the country in which the company is registered provides to a banking company registered in Bangladesh the same facilities which the Government or law of Bangladesh grants to companies registered in Bangladesh, and that the company complies with all the provisions of this Act applicable to companies outside Bangladesh. [...]" (ACT No.14 of 1991 on Bank Companies, last amended 09 July 2020 (Act No. 12 of 2020)  [google translated])
ACT No.14 of 1991 on Bank Companies, last amended 09 July 2020 (Act No. 12 of 2020)  [google translated]
[<a href="https://www.bb.org.bd/en/index.php/about/lawsnacts">Act</a>]