Is it possible to change the prefix of the slug field? There is the url https://www.example.com/MYSLUG. But it should be https://www.example.com/page1/page2/MYSLUG.
I've extended the TCA with this:

'appearance' => [
  'prefix' => \VENDOR\EXT\UserFunctions\FormEngine\SlugPrefix::class . '->getPrefix'
],

and it looks like this:

use TYPO3\CMS\Backend\Form\FormDataProvider\TcaSlug;

    class SlugPrefix
    {
        public function getPrefix(array $parameters, TcaSlug $reference): string
        {
            return '';
        }
    }

So now the prefix is empty. How can I set the prefix to an URL? I have the ID of the URL in the typoscript setup.