How to hide fields with toggle checkbox in ui_component Magento 2

Replace your form code with below

<field name="open_amount" formElement="checkbox">
          <argument name="data" xsi:type="array">
              <item name="config" xsi:type="array">
                  <item name="component" xsi:type="string">[Vendor]_[Module]/js/mycheckbox</item>
                  <item name="source" xsi:type="string">homeslider</item>
                  <item name="default" xsi:type="number">1</item>
              </item>
          </argument>
          <settings>
              <dataType>boolean</dataType>
              <label translate="true">Open Amount</label>
              <dataScope>status</dataScope>
          </settings>
          <formElements>
              <checkbox>
                  <settings>
                      <valueMap>
                          <map name="false" xsi:type="number">0</map>
                          <map name="true" xsi:type="number">1</map>
                      </valueMap>
                      <prefer>toggle</prefer>
                  </settings>
              </checkbox>
          </formElements>
        </field>
        <field name="min_val">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="label" xsi:type="string">Open Amount Min Value</item>
                    <item name="visible" xsi:type="boolean">true</item>
                    <item name="dataType" xsi:type="string">text</item>
                    <item name="formElement" xsi:type="string">input</item>
                    <item name="source" xsi:type="string">faq</item>
                </item>
            </argument>
        </field>
        <field name="max_val">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="label" xsi:type="string">Open Amount Max Value</item>
                    <item name="visible" xsi:type="boolean">true</item>
                    <item name="dataType" xsi:type="string">text</item>
                    <item name="formElement" xsi:type="string">input</item>
                    <item name="source" xsi:type="string">faq</item>
                </item>
            </argument>
        </field>

Make mycheckbox.js file in vendor/module/view/adminhtml/web/js

define([

   'underscore',

   'uiRegistry',

   'Magento_Ui/js/form/element/single-checkbox',

   'Magento_Ui/js/modal/modal',

   'ko'

], function (_, uiRegistry, select, modal, ko) {

   'use strict';

   return select.extend({


       initialize: function () {
           this._super();

           this.fieldDepend(this.value());

           return this;

       },

       onUpdate: function (value)
       {
        console.log(value);

           var field_min_val = uiRegistry.get('index = min_val'); // get field

           var field_max_val = uiRegistry.get('index = max_val'); // get fieldset

           if (value == 0) {

               field_min_val.hide();

               field_max_val.hide();
           }

           else {

               field_min_val.show();

               field_max_val.show();

           }
           return this._super();

       },
       fieldDepend: function (value)

       {
           setTimeout( function(){
               var field_min_val = uiRegistry.get('index = min_val');

               var field_max_val = uiRegistry.get('index = max_val');

                if (value == 0) {

                   field_min_val.hide();

                   field_max_val.hide();
                }

               else {

                   field_min_val.show();

                   field_max_val.show();

               }

           });

       }
   });

});

Hope it will be helpful.