Open your Metamask wallet, select the BNB Chain or BSC network, depending on how you have added it previously. You must be on the correct network before adding the BUSD token or you will not be able to do so.
Then scroll to the bottom of the window and you will see the option to import a token, click on it to add the BUSD contract.
importar token busd en metamask - ricemining
You will now need to tell Metamask the contract address for the BUSD token.