This looks like the problem is with verifying the implementation contract at address 0xA19C88A53D487f455f2200a2863b6cF9F1A53c69. The other errors seem to be caused by that.
Please follow How to verify a contract on Etherscan/BscScan/PolygonScan and see if you can verify the implementation contract by itself. For example, try passing in the implementation contract address to the npx hardhat verify command which will use hardhat-etherscan directly.