Binance dot KR exchange is another subsidiary of Binance. It is a centralized exchange launched in 2020. This exchange was founded in Korea but didn't even last a year before it was shut down permanently. According to the founders and the developers, the exchange was closed down due to low trading volume as well as low use of the exchange which has greatly affected tue liquidity of the exchange. The BKRW is the native token on this exchange, just like USDT which is pegged to the dollar, BKRW is also a stablecoin which pegged to Korean Won.
The closure of this exchange means that Korean traders will no longer be able to use unless they move to Binance itself. If you open the webpage, you'll see a message/announcement which clearly indicates that the exchange has closed down.