At this time Kraken does not support Binance chain (BEP20 Tokens). BEP20 tokens deposited to any Kraken address will not be credited and will result in the loss of your deposit. While BEP20 tokens use the same address format as Ethereum they are separate networks. Binance also provides such a warning on their withdrawal pages.
If you have accidentally deposited BEP20 tokens or have further questions regarding this feel free to create a support ticket here.