How do I get a dex to respect the burn/sending to dead wallet?

Smart Contracts
1

Hi,
Here is my simple contract:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract Test1 {
    string public name = "test1";
    string public symbol = "TEST1";
    uint256 public totalSupply = 1000 * 10**18; // 1000 tokens with 18 decimal places
    uint8 public decimals = 18;

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    address public deadWallet = 0x000000000000000000000000000000000000dEaD;

    event Transfer(address indexed from, address indexed to, uint256 value);

    constructor() {
        balanceOf[msg.sender] = totalSupply;
    }

    function transfer(address _to, uint256 _value) external returns (bool success) {
        require(_to != address(0), "Invalid address");
        require(_value <= balanceOf[msg.sender], "Insufficient balance");

        uint256 burnAmount = (_value * 5) / 100; // 5% burn for buys
        uint256 transferAmount = _value - burnAmount;

        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += transferAmount;
        balanceOf[deadWallet] += burnAmount;

        emit Transfer(msg.sender, _to, transferAmount);
        emit Transfer(msg.sender, deadWallet, burnAmount);

        return true;
    }

    function approve(address _spender, uint256 _value) external returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) external returns (bool success) {
        require(_from != address(0), "Invalid address");
        require(_to != address(0), "Invalid address");
        require(_value <= balanceOf[_from], "Insufficient balance");
        require(_value <= allowance[_from][msg.sender], "Allowance exceeded");

        uint256 burnAmount = (_value * 5) / 100; // 5% burn for sells
        uint256 transferAmount = _value - burnAmount;

        balanceOf[_from] -= _value;
        balanceOf[_to] += transferAmount;
        balanceOf[deadWallet] += burnAmount;
        allowance[_from][msg.sender] -= _value;

        emit Transfer(_from, _to, transferAmount);
        emit Transfer(_from, deadWallet, burnAmount);

        return true;
    }
}

Whenever I deploy and test it out, the dex completely ignores the burn/sending 5% to deadwallet and just transfers the whole lot. Im assuming at this point I need to import some openzepplin and change something? Please help me!

2

What do you mean by

the dex completely ignores the burn/sending 5% to deadwallet and just transfers the whole lot.

Are you saying the the Dex does a transfer that doesn't trigger your customp logic ?