How to pass the value and call js function from template.html using knockout js in(in checkout page) Magento 2?

I have to call and pass value to the js function(showPopup())from the template(when clicking the Verify OTP button). How to achieve this?. But now i am not able to call the js function.

layout file

                                                                                                                          
    
    Vendor_module/form/element/phone.html
        
            For delivery questions.
        
    

Vendor_module/view/frontend/web/js/view/form/element/phone.js

define([
    'Magento_Ui/js/form/form'
], function(Component) {
    'use strict';
    return Component.extend({
        defaults: {
            template: 'Vendor_module/form/element/phone',
        },
        initialize: function () {
            this._super();
            // component initialization logic
            return this;
        },

        /**
         * Form submit handler
         *
         * This method can have any name.
         */
        showPopup: function(){
          i need to get my phone number
        }

    });
});

Vendor_module/view/frontend/web/template/form/element/phone.html

 
    
    

        
            Verify OTP