Sometimes you need to quickly test the Model of your module or another vendor. And in order not to create a complete module, we can do it on one file.
Create file test.php in folder /pub:
/pub/test.php
<?php
ini_set('display_errors', 1);
use Magento\Framework\App\Bootstrap;
require __DIR__ . '/../app/bootstrap.php';
$params = $_SERVER;
$bootstrap = Bootstrap::create(BP, $params);
$obj = $bootstrap->getObjectManager();
$model = $obj->get('Vendor\ModuleName\Model\YourModel');
$model->execute();
// or
$model->yourMethodName();
Run script in terminal from project root folder:
php pub/test.php
Tested in Magento 2.4.3