Almost all tokens running on etherscan are also on bscscan, since bsc is a product of Etherscan even you can use a single address for both ETH and Binance smartchains, I'm not sure if bscsan adoption can overthrow ETH in the future.
That's obviously difficult to do because Etherscan was already popular before the existence of bscscan which at this time both are equally good for use by everyone in crypto, but it should also be noted that overthrowing ETH is not an easy thing to do