JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<button type="button" class="js-add-category">Add Category</button> <br> <br>

<div class="main">

<div class="cars">

<div class="cars-item js-cars-item">
  <ul>
    <li>
      <input type="checkbox" id="car-1-3">
      <label for="car-1-3"><i class="icon-tick"></i></label>
    </li>
    <li>
      <input type="checkbox" id="car-2-3">
      <label for="car-2-3"><i class="icon-tick"></i></label>
    </li>
    <li>
      <input type="checkbox" id="car-3-3">
      <label for="car-3-3"><i class="icon-tick"></i></label>
    </li>
  </ul>
</div>



<button type="button" class="js-add-section">Add Section</button>
</div>
<br>



<br>

CSS

.cars-item {
  border-bottom: 1px solid gray;
}

ul {
  /* Added to fully show console in snippet */
  margin: 2px;
}

li {
  display: inline;
}

.cars {
    box-sizing: content-box;    
    width: 250px;
    height: auto;
    padding: 10px;    
    border: 5px solid blue;
}

JavaScript

$(".cars").on("change", '.js-cars-item [type="checkbox"]', function() {
  var idx = $(this).closest('li').index(); //Get the index - Number in order
  var chk = $(this).is(":checked"); //Get if checked or not
  var obj = this; //Checkbox object

  $('.js-cars-item').each(function() { //Loop every js-cars-item
    //Find the checkbox with the same index of clicked checkbox. Change disabled property
   $(this).closest(".js-cars-items").find('li:eq(' + idx + ') [type="checkbox"]').not(obj).prop("checked", 		false);
  });

  var checkeds = [];
  $(".cars-item input:checkbox:checked").each(function(index) {
    checkeds[index] = $(this).attr('id');
  });
  console.clear();
  console.log("These are checked:", checkeds);
})





$('.js-add-category').click(function() {
	
  var categoryContent = `<div class="cars">

<div class="cars-item js-cars-item">
  <ul>
    <li>
      <input type="checkbox" id="car-1-3">
      <label for="car-1-3"><i class="icon-tick"></i></label>
    </li>
    <li>
      <input type="checkbox" id="car-2-3">
      <label for="car-2-3"><i class="icon-tick"></i></label>
    </li>
    <li>
      <input type="checkbox" id="car-3-3">
      <label for="car-3-3"><i class="icon-tick"></i></label>
    </li>
  </ul>
</div>

<button type="button" class="js-add-section">Add Section</button>
</div> <br>`

$('.main').append(categoryContent);
  
});


$(document.body).on('click', 'button.js-add-section', function() {
	var sectionContent = `<div class="cars-item js-cars-item">
  <ul>
    <li>
      <input type="checkbox" id="car-1-6>
      <label for="car-1-6"><i class="icon-tick"></i></label>
    </li>
      <li>
      <input type="checkbox" id="car-2-6>
      <label for="car-2-6"><i class="icon-tick"></i></label>
    </li>
      <li>
      <input type="checkbox" id="car-3-6>
      <label for="car-3-6"><i class="icon-tick"></i></label>
    </li>
  </ul> </div>`
  
  $(this).closest('.cars').append(sectionContent);
  
});