On Binance Smart Chain I'm sure you have plenty of pairs which have BUSD on one side, but I haven't used BSC for defi yet.
On Binance there are launchpools, and all of them have BNB and BUSD and a 3rd coins which is different from project to project. They even have a sort of "defi" on Binance and BUSD can be used there.
But to be honest, on Binance is convenient. On BSC is likely to have much better APY.
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