That is right, it is confusing but possible. I think you have been provided with the information you need about it, I do not know much about altcoins or smart chains but you can check what zasad@ posted above. What I just want to tell you is that you should be careful, this is just a means someone can lose his coins, some people will mistakenly send BSC token to ERC20 address on an exchange, if the exchange is not supporting BSC, the person may likely lose his coins if the requirements to recovery it is not possible like the total amount sent to be of certain minimum amount but which can be $2000 or higher.