I deployed last week with Remix - I'm trying to verify it now, but I'm getting the infamous "Error! Unable to generate Contract ByteCode and ABI" issue.
The code I'm verifying is copied directly from Remix, so I'm confident it's identical, and I've triple/quadruple checked the compiler versions.
I prefer to close this topic, if you still can not verify your contracts following all the tutorials I shared above, you can reply under this topic and ping me.
I follow the tutorial I shared above, and I really recommend to verify contracts via plugin, you can find a relative plugin in Truffle or Hardhat, and for more details, you can look at this tutorial: