Although most assets on Coinbase are only supported on the blockchain network that hosts them (even though the asset may technically be available on multiple networks), we do offer multi-chain support for select assets.
The benefit of being able to choose from more than one network for your Coinbase transaction is that some networks may offer lower fees and higher speeds.
If an asset is supported on multiple networks, the available networks will be displayed during the send or receive steps and you'll have the option to choose which network to use for the transaction.
Note: The same network must be used on both the sending end and the receiving end unless the transaction involves the Polygon and Ethereum networks. See examples below.