you need to connect to bsc test network shown here https://dapp-world.com/blogs/01/how-to-connect-metamask-to-binance-smart-chainbsc--1618137142422https://dapp-world.com/blogs/01/how-to-connect-metamask-to-binance-smart-chainbsc--1618137142422
Then from remix's deploy section choose Web3 Provider and then deploy
Hope it works