Unable to verify upgradeable beacon on Mantle

I read the tutorial and tried to verify it, but not successful.

:computer: Environment

I am using Hardhat

Please provide the information listed in Required information when requesting support for Upgrades Plugins if possible. At least share what addresses you are using and what versions of @openzeppelin/upgrades-core and @openzeppelin/hardhat-upgrades you have installed.

have installed @openzeppelin/hardhat-upgrades@^1.22.0 but haven't used @openzeppelin/upgrades-core . The address for the contract on the Mantle testnet is 0x1330388CFD26D78c86DF904C8d901ea537928E78.
Thanks

Please provide the output of

npm list @openzeppelin/upgrades-core

since this package is a dependency of @openzeppelin/hardhat-upgrades.

Which block explorer are you trying to verify on?

@openzeppelin/upgrades-core@1.24.1
explorer https://explorer.testnet.mantle.xyz/ (mantle georli)

Output:
└─┬ @openzeppelin/hardhat-upgrades@1.22.1
└── @openzeppelin/upgrades-core@1.24.1
explorer: Mantle Georli explorer (https://explorer.testnet.mantle.xyz/)

The UpgradeableBeacon contract at your address is verified now. Here is the Solc Input JSON for the proxy contracts from your version of the plugin, you can use this if you need to verify on other networks or other block explorers:

solc-input.json (38.6 KB)