It is the Store (Microsoft / Google / Apple) who decides the currency exchange rate. We, as developer, only get to enter the base price in USD dollar for all countries.
If you have concerns with the exchange rate for your local currency or the package price, please contact the Store support to raise your concerns, with enough users to complain about the same currency, there might be a chance they may consider your request.
If you have concerns with the exchange rate for your local currency or the package price, please contact the Store support to raise your concerns, with enough users to complain about the same currency, there might be a chance they may consider your request.