TYPO3 Core

The following is a working workaround:

typo3conf/ext/cdx_feuser_locations/Classes/Form/Container/SingleFieldContainer.php:

<?php
namespace Codappix\CdxFeuserLocations\Form\Container;

/*
 * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

use TYPO3\CMS\Backend\Form\Container\SingleFieldContainer as CoreSingleFieldContainer;

/**
 * Extend original SingleFieldContainer to allow render type resolving for
 * passthrough fields.
 *
 * Workaround for https://forge.typo3.org/issues/82762
 */
class SingleFieldContainer extends CoreSingleFieldContainer
{
    public function render() : array
    {
        $resultArray = parent::render();
        $fieldConfig = $this->data['processedTca']['columns'][$this->data['fieldName']];

        if ($fieldConfig['config']['type'] !== 'passthrough') {
            return $resultArray;
        }

        $options = $this->data;
        $options['parameterArray'] = [
            'fieldConf' => $fieldConfig,
            'itemFormElValue' => $this->data['databaseRow'][$this->data['fieldName']],
        ];
        $options['renderType'] = 'passthrough';

        if (!empty($options['parameterArray']['fieldConf']['config']['renderType'])) {
            $options['renderType'] = $options['parameterArray']['fieldConf']['config']['renderType'];
        }

        return $this->nodeFactory->create($options)->render();
    }
}

typo3conf/ext/cdx_feuser_locations/ext_tables.php:

        $GLOBALS['TYPO3_CONF_VARS']['SYS']['formEngine']['nodeRegistry'][$extKey . '-singleFieldContainer'] = [
            'nodeName' => 'singleFieldContainer',
            'priority' => 10,  
            'class' => \Codappix\CdxFeuserLocations\Form\Container\SingleFieldContainer::class,
        ];

No feedback within the last 90 days => closing this issue.

If you think that this is the wrong decision or experience this issue again, then please write to the mailing list typo3.teams.bugs with issue number and an explanation or open a new ticket and add a relation to this ticket number.

Thank you and best regards

i'll improve tca docs a bit to add more details on type=none for this 'virtual' use case.