An awesome list of contract verification related tutorials and 2 gwei thoughts.
Types of Contract Verification
What are Constructor Arguments
Long read on contract verification by Ethereum Foundation
How to verify using Hardhat
How to verify using Foundry
How to verify using Remix
How to verify using Truffle
Using Scaffold ETH with Austin Griffith
Building and verifying contracts with thirdweb
Walkthrough of contract verification by Chainlink
Writing Hello World with Alchemy
Verifying a pre-existing contract with Rugdoc
Verify a custom contract using thirdweb's dashboard
Verify smart contracts using Remix by Smart Contract Programmer