Difficult to get BDT data for last 10 years. Please lemme know if you find it somewhere.
I'm not really sure what you are looking for exactly. However, here's one site-
https://www.xe.com/currencycharts/?from=BTC&to=BDT&view=10YYou can see the last 10 years price chart in BDT for BTC. I think this can help you. Not sure if you can get data from them or not. They have API for currency but that's a paid tool. I can help you of course if the fee is reasonable for me. Please check if anything is possible from this.
It would be great if you get data from Binance p2p for the last year but that's something would be difficult as far as I know.