Exchange bnb coin not find

Hy I ve test bridge and send 0.01bnb coin (bsc to iotex (iotube use for this test). I have received correctly bnb coin, but on mimmo I find not this token for do exchange… Could you help me if you know how exchange.
And another question, cyclone token with iotube are possible to send, of eth to iotex or bsc… And if I connect my wallet on matic, can I see same amount of cyclone… I do test for erc20,between matic, ethereum.
But my important question is for bnb coin exchange, thanks à lot. Best regards.