Hi @JayM,
Unfortunately to verify you will need to use the command line.
You will need to convert your GitHub imports to npm imports.
I recommend using Hardhat: Verify smart contract inheriting from OpenZeppelin Contracts
Alternatively (though I recommend multifile verification) you can flatten your contract and encode your constructor parameters using https://abi.hashex.org/
If you get stuck then you can post your Solidity code, the constructor parameters, whether you used the optimizer and the address of the contract (and the network) and someone in the community may be able to help you verify.