We have to check the Coinbase account first, then select USDC deposit, select the Polygon Matic blockchain, if it is available then you can deposit but if not, don't deposit because it is dangerous.
So, It is very possible for us to send USDC on the Polygon Matic blockchain to Coinbase Exchange because everyone knows that Coinbase is a large centralized exchange owned by Brian Armstrong.
With the great power that Coinbase has, it certainly has a lot of achievements in being able to prepare blockchains for various altcoins, such as Ethereum, Binance Smart Chain, Polygon Matic, Polkadot, Avalanche etc.