Magento 2 category attribute value returns null

Vendor/Extension/Setup/Patch/Data/CustomAttribute.php

<?php

namespace VendorExtensionSetupPatchData;

use MagentoEavSetupEavSetup;
use MagentoEavSetupEavSetupFactory;
use MagentoFrameworkSetupModuleDataSetupInterface;
use MagentoFrameworkSetupPatchDataPatchInterface;
use MagentoCatalogModelCategory;

class CreateCustomCategoryAttribute implements DataPatchInterface
{
    private $moduleDataSetup;

    private $eavSetupFactory;

    public function __construct(ModuleDataSetupInterface $moduleDataSetup, EavSetupFactory $eavSetupFactory)
    {
        $this->moduleDataSetup = $moduleDataSetup;
        $this->eavSetupFactory = $eavSetupFactory;
    }

    /**
     * {@inheritdoc}
     */
    public function apply()
    {
        $eavSetup = $this->eavSetupFactory->create(['setup' => $this->moduleDataSetup]);
        $eavSetup->addAttribute(
            Category::ENTITY,
            'grid_layout',
            [
                'type' => 'int',
                'label' => 'Grid Layout',
                'input' => 'boolean',
                'sort_order' => 100,
                'source' => 'MagentoEavModelEntityAttributeSourceBoolean',
                'global' => 1,
                'visible' => true,
                'required' => false,
                'user_defined' => false,
                'default' => '1',
                'group' => 'General Information'
            ]
        );
    }

    /**
     * {@inheritdoc}
     */
    public static function getDependencies()
    {
        return [];
    }

    /**
     * {@inheritdoc}
     */
    public function getAliases()
    {
        return [];
    }
}

Vendor/Extension/view/adminhtml/ui_component/category_form.xml

<?xml version="1.0" encoding="UTF-8"?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <fieldset name="general">
        <field name="grid_layout">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="dataType" xsi:type="string">boolean</item>
                    <item name="formElement" xsi:type="string">checkbox</item>
                    <item name="label" xsi:type="string" translate="true">Enable Grid Layout</item>
                    <item name="prefer" xsi:type="string">toggle</item>
                    <item name="valueMap" xsi:type="array">
                        <item name="true" xsi:type="string">1</item>
                        <item name="false" xsi:type="string">0</item>
                    </item>
                    <item name="default" xsi:type="number">0</item>
                </item>
            </argument>
        </field>
    </fieldset>
</form>

list.phtml

$registry = MagentoFrameworkAppObjectManager::getInstance()->get('MagentoFrameworkRegistry');
$currentCategory = $registry->registry('current_category');
$grid_layout = 0; 
if ($currentCategory) {
    $grid_layout = $currentCategory->getData('grid_layout');
    echo $grid_layout;
}

it return nothing

can anyone help me about this?