Total Supply not displayed

Here my code, but Total Supply is not displayed. I’m so stupid? (here the contract: Contract Address 0xd102f3fcdb3edc93d238fb5e4d7371f2d1156f1d | BscScan)

pragma solidity ^0.6.12;
//SPDX-License-Identifier: Unlicensed

contract TotalsupplyDisplay {

string public name;
string public symbol;
uint public decimals;
uint public _totalSupply;

mapping (address => uint) public balances;

constructor() public {
    
   _totalSupply = 100000000000 * (10 ** uint(decimals));
   name = "TokenName";
   symbol = "TKN";
   decimals = 7;
   
}

function totalSupply() public view returns (uint256) {
    return (_totalSupply);
}

function balanceOf(address tokenOwner) public view returns (uint) {
    return balances[tokenOwner];
}


}

I’m really so stupid?

Hi @phoenix1977!

This is not the right place to ask your question, as it appears to me as more of an ad-hoc support question. → For urgent Solidity support questions, please use the Solidity Gitter/Matrix chat or consider checking out the Ethereum StackExchange.

Please check the welcome message before posting, it has all the relevant information. :slight_smile: