<field name="entity_id">
        <argument name="data" xsi:type="array">
            <item name="config" xsi:type="array">
                <item name="dataType" xsi:type="string">text</item>
                <item name="label" translate="true" xsi:type="string">product name</item>
                <item name="formElement" xsi:type="string">input</item>
                <item name="source" xsi:type="string">Product</item>
                <item name="disabled" xsi:type="boolean">true</item>
                <item name="class" xsi:type="string">Magneto_PopupQuestionProducts</item>
                <item name="sortOrder" xsi:type="number">30</item>
                <item name="dataScope" xsi:type="string">entity_id</item>
                <item name="validation" xsi:type="array">
                    <item name="required-entry" xsi:type="boolean">false</item>
                </item>
            </item>
        </argument>
    </field>

<?php
namespace MagnetoPopupQuestionUiComponentListingColumn;

use MagentoCatalogApiProductRepositoryInterface;
use MagentoFrameworkViewElementUiComponentContextInterface;
use MagentoFrameworkViewElementUiComponentFactory;
use MagentoUiComponentListingColumnsColumn;

class Products extends Column
{
    protected $_ProductRepository;

    public function __construct(
        ContextInterface $context,
        UiComponentFactory $uiComponentFactory,
        ProductRepositoryInterface $ProductRepository,
        array $components = [],
        array $data = []
    ) {
        $this->_ProductRepository = $ProductRepository;
        parent::__construct($context, $uiComponentFactory, $components, $data);
    }

    public function prepareDataSource(array $dataSource)
    {
        if (isset($dataSource['data']['items'])) {
            foreach ($dataSource['data']['items'] as $key => $items) {
                $product = $this->_ProductRepository->getById($items["entity_id"]);
                $dataSource['data']['items'][$key]['entity_id'] = $product->getName(); //to get product name
            }
        }
        return $dataSource;
    }
}

<?php
namespace MagentoPopupQuestionUiComponentListingColumn

use MagentoCatalogApiProductRepositoryInterface;
use MagentoFrameworkViewElementUiComponentContextInterface;
use MagentoFrameworkViewElementUiComponentFactory;
use MagentoUiComponentListingColumnsColumn;

class Products extends Column
{
    protected $_ProductRepository;

    public function __construct(
        ContextInterface $context,
        UiComponentFactory $uiComponentFactory,
        ProductRepositoryInterface $ProductRepository,
        array $components = [],
        array $data = []
    ) {
        $this->_ProductRepository = $ProductRepository;
        parent::__construct($context, $uiComponentFactory, $components, $data);
    }

    public function prepareDataSource(array $dataSource)
    {
        $fieldName = $this->getData('name');

        if (isset($dataSource['data']['items'])) {
            foreach ($dataSource['data']['items'] as &$item) {
                $product = $this->_ProductRepository->getById($item["entity_id"]);
                 $item[$fieldName] = $product->getName();
            }
        }
        return $dataSource;
    }
}