Create Customer Attribute with data script - Magneto 2

Path - app/code/Vendor/Module/Setup/Patch/Data/AddCustomCustomerAttribute.php

<?php

namespace Vendor\Module\Setup\Patch\Data;

use Magento\Customer\Model\Customer;
use Magento\Customer\Setup\CustomerSetupFactory;
use Magento\Eav\Model\Entity\Attribute\SetFactory as AttributeSetFactory;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\Patch\DataPatchInterface;

class AddCustomCustomerAttribute implements DataPatchInterface
{
    /**
     * @var ModuleDataSetupInterface
     */
    protected $moduleDataSetup;

    /**
     * @var CustomerSetupFactory
     */
    protected $customerSetupFactory;

    /**
     * @var AttributeSetFactory
     */
    protected $attributeSetFactory;

    /**
     * AddCustomerPhoneNumberAttribute constructor.
     * @param ModuleDataSetupInterface $moduleDataSetup
     * @param CustomerSetupFactory $customerSetupFactory
     * @param AttributeSetFactory $attributeSetFactory
     */
    public function __construct(
        ModuleDataSetupInterface $moduleDataSetup,
        CustomerSetupFactory $customerSetupFactory,
        AttributeSetFactory $attributeSetFactory
    ) {
        $this->moduleDataSetup = $moduleDataSetup;
        $this->customerSetupFactory = $customerSetupFactory;
        $this->attributeSetFactory = $attributeSetFactory;
    }

    /**
     * {@inheritdoc}
     */
    public function apply()
    {
        $customerSetup = $this->customerSetupFactory->create(['setup' => $this->moduleDataSetup]);

        $customerSetup->removeAttribute(
            Customer::ENTITY,
            'custom_attribute'
        );

        $customerEntity = $customerSetup->getEavConfig()->getEntityType(Customer::ENTITY);
        $attributeSetId = $customerEntity->getDefaultAttributeSetId();

        $attributeSet = $this->attributeSetFactory->create();
        $attributeGroupId = $attributeSet->getDefaultGroupId($attributeSetId);

        $customerSetup->addAttribute(
            Customer::ENTITY,
            'custom_attribute',
            [
                'type' => 'varchar',
                'label' => 'Custom Attribute',
                'required' => false,
                'user_defined' => true,
                'sort_order' => 1000,
                'position' => 1000,
                'default' => 0,
                'system' => 0
            ]
        );

        $attribute = $customerSetup->getEavConfig()->getAttribute(
            Customer::ENTITY,
            'custom_attribute'
        );

        $attribute->addData(
            [
                'attribute_set_id' => $attributeSetId,
                'attribute_group_id' => $attributeGroupId,
                'used_in_forms' => ['adminhtml_customer']
            ]
        );

        $attribute->save();
    }

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

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