Swap BNB from smart chain to ETH on Mainnet

Hello, I have set up the smart chain network to metamask and successfully sent BNB to metamask. Now I would like to perform an exchange on uniswap. If I attempt to use BNB and connect my wallet I get a network error.

Is it possible for me to swap my BNB to eth in Metamask and have the eth show up in the eth mainnet for me to use on uniswap?