hardhat-deploy lets you easily verify contracts on Etherscan, and we have added a helper script to /packages/hardhat to let you do that and we have abstracted the actual command away from the user. Please see the packages/hardhat/package.json and look for the 'verify' command, you will see the hardhat command in there (hardhat etherscan-verify --api-key <your_key>). You can pass the --network parameter."verify" command in packages/hardhat/package.json