ChainId values are not related to EVM Ids. Since LayerZero will span EVM & non-EVM chains the chainId are proprietary to our Endpoints.
File: src/RootBridgeAgent.sol
40: uint16 public immutable localChainId;
File: src/CoreRootRouter.sol
46:     /// @notice Root Chain Layer Zero Identifier.
47:     uint256 public immutable rootChainId;
