select2 on change event

Hi !
I'm using select element with data-kt-select2="true" , but when I declare on change event in my page KTUtil.onDOMContentLoaded , the event will not be trigger . Anyone know how to fix it ? (I'm using metronic laravel template and use laravel mix).

This is my html and js code :

<select class="form-select form-select-solid fw-bolder" id="birthdate_y" name="birthdate_y" data-kt-select2="true" data-allow-clear="true" data-hide-search="true" >
 <option value=""></option>
 <option value="1">1</option>
 </select>

KTUtil.onDOMContentLoaded(function () {
 $("#birthdate_y").on("change", function(){
 console.log("in");
 });
 });