I cannot turn off my extension from button at Popup.html

I am developing extension in manifest version 3. My extenison’s purpose is to notify user if they are using chrome for more than 2 hours. i have created notification via timer in background.js and when a user clicks on the button at notification it must open Break.html in new tab at browser. I have done this functionality. Now, I want to turn off my extension from button at POPUP.HTML via popup.js. So that, when a user clicks on this button it must stop seeing those notifications from my extension. I have used

chrome.management.setEnabled("Extension ID", false);

but this entirely stops my extension from chrome://extensions/ I want some other way to stop my extension.
here is my code:
BACKGROUND.JS

//===creating notification===
  var notifyTimer = setInterval(func,20000);
  function func(){ 
  var opt = {
    type: "image",
    title: "E-Gym",
    message: "You have been working for too long on Chrome. Would you like to take a break?",
    iconUrl: "logo.png",
    requireInteraction: true,
    imageUrl: "background.png",
    buttons: [{
      title: "Let's Begin Workout"  }]
  };
  chrome.notifications.create(opt, creationCallback);
  
  function creationCallback(id){
    myNotificationID = id; 
    }
    
}
//===Opening break page when notification button is clicked======
chrome.notifications.onButtonClicked.addListener(function(notifId) {
  
 
    chrome.tabs.create({ url: "break.html" })
});

POPUP.HTML:

<!DOCTYPE html>
<html>
    <head>
        <link rel="stylesheet" href="storyboardstyle.css">
        <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet"> 
    </head>
    
    <body style="width: 280px; height: 210px; background-color:#f9c8c4"> 
        <div style="position: absolute; left:5px; top:5px; background-color: none; border: 2px solid rgb(203, 50, 91); color:antiquewhite; width:270px; height: 200px;"></div>  
        <div id="heading-gympass"><h1><b>E-GYM</b></h1>  
        <button  id="stop_btn">Stop Extension</button><div> 
 
            
            
        <script src="popup.js"></script>
        
    </body>
</html>

POPUP.JS

const startBtn = document.getElementById("stop_btn");
startBtn.addEventListener("click", myFunction);
function myFunction() {
  
// I WANT SOME CODE to stop extension 
// I have used chrome.management but it disables my entire extension from chrome://extensions/
// chrome.management.setEnabled("Extension ID", false);
  
}

I want to write some code in popup.js to stop my extension functionality.Can anyone help me to write code to stop extension or stop execution of background.js