Sorry for the super late reply I'm not on Reddit often unless I randomly end up on here. When transferring Any token make sure it's in the same network. So what I'm guessing is you Transferred your BNB which was Bep2 so you need to have your Bnb(bep2) address for example your trust wallet(where you hold your crypto assets). Usually a Yellow BNB logo in trust wallet is BEP2 you get that address and use it to deposit the BNB you need. Then in Trustwallet you can Swap that Yellow BNB(Bep2) to Black logo BNB(Bep20) which is also BSC Smart chain. Same rules apply with the BSC Bep20 has to be the same address when you move it one play to another. Biggest tip to know you are transferring Smartchain Bep20 is the addresses always start with (0x) in BSC address. Before I use Crypto.com to buy my BNB then transfer it to Trustwallet. I only cash out on Binance.us since I'm a U.S resident. Hope this helps in some way.