Zend certified PHP/Magento developer

Magento2 Reload custom section on checkout sidebar

I have added a custom discount and added a discount within the sidebar section, The Order total is getting refreshed but my custom discount remains the same, How can we reload it?
Please refer attached screenshot

checkout_index_index.xml

 <?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>   
        <referenceBlock name="checkout.root">
            <arguments>
                <argument name="jsLayout" xsi:type="array">
                    <item name="components" xsi:type="array">
                        <item name="checkout" xsi:type="array">
                            <item name="children" xsi:type="array">
                                <item name="steps" xsi:type="array">
                                    <item name="children" xsi:type="array">
                                        <item name="billing-step" xsi:type="array">
                                            <item name="children" xsi:type="array">
                                                <item name="payment" xsi:type="array">
                                                    <item name="children" xsi:type="array">
                                                        <item name="beforeMethods" xsi:type="array">
                                                            <item name="children" xsi:type="array">
                                                                <item name="lms-rewardpoint" xsi:type="array">
                                                                    <item name="component" xsi:type="string">Geekay_Rewardpoint/js/checkout/lms</item>
                                                                </item>
                                                            </item>
                                                        </item>
                                                    </item>
                                                </item>
                                            </item>
                                        </item>
                                    </item>
                                </item>
                                <item name="sidebar" xsi:type="array">
                                    <item name="children" xsi:type="array">
                                        <item name="summary" xsi:type="array">
                                            <item name="children" xsi:type="array">
                                                <item name="totals" xsi:type="array">
                                                    <item name="children" xsi:type="array">
                                                        <item name="custom_discount" xsi:type="array">
                                                           <item name="component"  xsi:type="string">Geekay_Rewardpoint/js/view/checkout/summary/lmsusedpoint</item>
                                                           <item name="sortOrder" xsi:type="string">20</item>
                                                           <item name="config" xsi:type="array">
                                                               <item name="custom_discount" xsi:type="string" translate="true">Used Points</item>
                                                           </item>
                                                        </item>
                                                    </item>
                                                </item>
                                            </item>
                                        </item>
                                    </item>
                                </item>
                            </item>
                        </item>
                    </item>
                </argument>
            </arguments>
        </referenceBlock>
    </body>
</page>

Js Teamplate:

<!-- ko if: getCustomDiscount() -->
<tr class="totals customdiscount excl">
   <th class="mark" colspan="1" scope="row" data-bind="text: custom_discount"></th>
   <td class="amount">
       <span class="price" data-bind="text: getCustomDiscount(), attr: {'data-th': custom_discount}"></span>
   </td>
</tr>
<tr>
   <td><button data-bind="click: removePoints">Remove Geekay XP</button></td>
</tr>
<!-- /ko -->

Js file

define(
        [
            'ko',
            'jquery',
            'uiComponent',
            'mage/url'
        ],
        function (ko, $, Component,url) {
            'use strict';     
            return Component.extend({
                defaults: {
                    template: 'Geekay_Rewardpoint/checkout/summary/lmsusedpoint'
                },   
                getCustomDiscount: function(){               
                    var amount = 0;          
                    var ajaxUrl=BASE_URL+"rewardpoint/index/usedpoint";                        
                    $.ajax({
                        type: "POST",
                        dataType: 'json',
                        async:false,      
                        url: ajaxUrl,
                        data: {points:0},
                    }).done(function (result){
                        if(result.status==200 && result.amount>0){
                          amount = result.symbol+result.amount;
                        }
                    });                    
                    return amount;
               }
            });
        }
    );

This is the second file from which I want to reload above discount template:

define(
    [
        'ko',
        'jquery',
        'uiComponent',
        'mage/url',
        'Magento_Checkout/js/action/get-totals',
        'Magento_Checkout/js/action/get-payment-information',
    ],
    function (ko, $, Component,url,getTotalsAction,getPaymentInformationAction) {
        'use strict';     
        return Component.extend({
            defaults: {
                template: 'Geekay_Rewardpoint/checkout/lmspoint'
            },   
            getCustomDiscount: function(){               
                var amount = 0;          
                var ajaxUrl=BASE_URL+"rewardpoint/index/amount";                        
                $.ajax({
                    type: "POST",
                    dataType: 'json',
                    async:false,      
                    url: ajaxUrl,
                    data: {points:0},
                }).done(function (result){
                    if(result.status==200 && result.amount>0){
                      amount = result.symbol+result.amount;
                    }
                });                    
                return amount;
           },   
            submitLmsform : function() {                    
                    $('body').trigger('processStart');
                    let lms_point = $('#lms_point').val();             
                    if(lms_point<1){                      
                        $('.lms_point_message').text("Please enter valid Point");
                        $('#lms_point').val('').trigger("change");
                        setTimeout(function(){ $('.lms_point_message').text("");},5000);
                    }else{                         
                        var linkUrls  = url.build('rewardpoint/index/apply');
                        $.ajax({                             
                            url: linkUrls,
                            showLoader: true,
                            data: {lms_point:lms_point},
                            type: "POST",
                            dataType: 'json'
                        }).done(function (data) {                                         
                            if(data.status=='success'){
                                var deferred = $.Deferred();
                                getTotalsAction([], deferred);    
                                getPaymentInformationAction(deferred);
                               // $('#lms_point').attr('disabled','disabled').trigger("change");
                               // $('#vstbtn').attr('disabled','disabled');
                                $('.lms_point_success').text(data.message);                                  
                                setTimeout(function(){ 
                                    $('.lms_point_success').text("");
                                },4000); 
                            }else{                               
                                $('.lms_point_message').text(data.message);
                                $('#lms_point').val('').trigger("change");
                                setTimeout(function(){ 
                                    $('.lms_point_message').text("");
                                },5000); 
                            }    
                            // location.reload();                        
                        });
                    }
                    $('body').trigger('processStop');               
                }
        });
    }
);