<form class="class_check_form" id="id_check_form" action="/action_page.php"><br>
  <input type="text" id="text_val" name="firstname">
  <br>
</form> 

<button id="add_check_box">add buton</button>

var count = 0;

$("#add_check_box").click(function()
{
  count++;
  var form_text_val = $('#text_val').val();

  $(".class_check_form").append(
    `　
    <div class="form-check" id="form-check${count}">
    <input type="checkbox" class="form-check-input">
    <label class="form-check-label" for="exampleCheck1" id="${count}" >${form_text_val}</label>
    <p class="delate" style="color:blue; line-height:1.5; display:none;" id="buton${count}">delate</p>
    </div>
    `
  ); 
})

$("body").on("mouseover", "label", 
    function () {
    console.log(this.id);
    $(`#buton${this.id}`).show();
    }
);

$("body").on("mouseleave", "label", 
    function () {
    console.log(this.id);
    idd = this.id
    setTimeout(button_all_delate, 10000);
    }
);

$("body").on("click", "p", 
    function () {

    console.log(this.id);
    button_id = this.id.replace("buton", "");
    $(`#form-check${button_id}`).remove();

    }
);

 function button_all_delate(){
 $(`.delate`).hide();
}