Transfer ETH from main network to Binance smart chain network?

I am trying to swap ETH to SFUND via pankcakeswap.
Now i purchaced the ETH via Coinbase and the transferred that to metamask wallet.

Then i tried to connect my Metamask wallet to pancakeswap but it forces a switch from “main network” where my ETH is stored to “Binance smart chain main net” so pancakeswap sees no funds in my wallet to exchage to SFUND.
I am lost here. Who can help me get SFUND successfully?