How to verify upgradeable contract on opbnb-testnet by Hardhat?

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Right, although since it is a UUPS proxy, it is using the ERC1967Proxy contract, not TransparentUpgradeableProxy. So the constructor is:

contract ERC1967Proxy is Proxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `implementation`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `implementation`. This will typically be an
     * encoded function call, and allows initializing the storage of the proxy like a Solidity constructor.
     *
     * Requirements:
     *
     * - If `data` is empty, `msg.value` must be zero.
     */
    constructor(address implementation, bytes memory _data) payable {
        ERC1967Utils.upgradeToAndCall(implementation, _data);
    }
...

An easier way is to look at the input data of the creation transaction for your proxy: https://testnet.opbnbscan.com/tx/0xa287b0b69472cb4961c528b16e799136a520f700b5407595314c3cdd0a21f8d6?tab=overview. You can see that the encoded constructor arguments are at the last portion of the bytecode.

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