Verified Smart Contract on BSC, But Write Contract Unavailable

Hi moderators,
I've published a contract to bscscan and verified it. ReadContract is available but for WriteContract
It says
Sorry, we were unable to locate a matching Contract ABI or SourceCode for this contract.
If you are the contract owner, please [Verify Your Contract Source Code]

I've already published it unable to publish/verify again. Any help would be appreciated.

truffle, truffle-flattener, solidity 0.8.10

It is available for me.