forminator_default_minutes.php

<?php
/**
 * Plugin Name: [Forminator] Time Date Picker Minute Default Value
 * Plugin URI: https://premium.wpmudev.org
 * Description: With this snippet is possible set all Forminator Time Date Picker Minute field to a default value, 00
 * Author: Alfredo Galano Loyola @ WPMUDEV
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */
add_action( 'wp_footer', 'setForminatorDefaultMinutes' );
function setForminatorDefaultMinutes() { ?>
      <script>
        //Use for simple forms
        function setDefaultMinutes(){
            //Set All Time Datepicker Minutes to 00
			jQuery('[id*="-minutes_"]').val(00);
			jQuery('[id*="-minutes_"]').trigger('change');
        }
        //Use when the form have pages to re-check after every click
        var timers = jQuery('[id*="-minutes_"]');
        function timersDefault(){
            for (let index = 0; index < timers.length; index++) {
                //Check if the timer is showing the - and then change the value
                if (timers[index].value =="") {
                    jQuery('#'+timers[index].getAttribute('id')).val(00);
			        jQuery('#'+timers[index].getAttribute('id')).trigger('change');
                    
                }
                
            }

        }

		jQuery( document ).ready(function() {
            setDefaultMinutes();
            
            setTimeout( function() {
            //Binding click to the Next Button
            var btn_next = document.querySelector( '.forminator-button-next' );
            if ( typeof( btn_next ) != 'undefined' && btn_next != null ) {
    			btn_next.addEventListener('click', function() {
                    console.log('Clicked Next!!!');
                    timersDefault();
    			});
            
    		}
    		//Binding click to the Back Button
    		var btn_back = document.querySelector( '.forminator-button-back' );
			if ( typeof( btn_back ) != 'undefined' && btn_back != null ) {

				btn_back.addEventListener( 'click', function() {
				    console.log('Clicked Back!!!');
				    timersDefault();
				});
			}
    		
    		
    		
            }, 1 );


		});
		
      </script>
	  <?php
}