I am not sure of the law stated by Bank of Bangladesh or Bangladeshi authorities about banning crypto or Bitcoin.
The news that you show here is July 29, 2021, in my opinion that news is out of date, I see Bangladeshi authorities implementing rules and laws that change every time against crypto users, the proof is that I saw the latest news February 2023.
Link:
Best Forex Trading Brokers in BangladeshIs Bitcoin available in Bangladesh?
Bitcoin is available in Bangladesh, which has an extensive peer-to-peer network. The popularity of cryptocurrencies has started to attract international cryptocurrency exchanges to Bangladesh. Traders can also take advantage of cryptocurrency CFDs provided by their Forex brokers.
Fact, Bitcoin and crypto users in Bangladesh can still use Bitcoin and can buy/sell.