try to get it work

admin/src/Controller/PartController.php

@@ -0,0 +1,16 @@
+<?php
+/**
+ * @package		Depot.Administrator
+ * @subpackage	com_depot
+ * @author		Thomas Kuschel <thomas@kuschel.at>
+ * @copyright	(C) 2023 KW4NZ, <https://www.kuschel.at>
+ * @license		GNU General Public License version 2 or later; see LICENSE.md
+ * @since		0.0.3
+ */
+
+use Joomla\CMS\MVC\Controller\FormController;
+
+class PartController extends FormController
+{
+
+}

admin/src/Model/DepotModel.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * @package		Depot.Administrator
+ * @subpackage	com_depot
+ * @author		Thomas Kuschel <thomas@kuschel.at>
+ * @copyright	(C) 2023 KW4NZ, <https://www.kuschel.at>
+ * @license		GNU General Public License version 2 or later; see LICENSE.md
+ * @since		0.0.3
+ */
+
+namespace KW4NZ\Component\Depot\Administrator\Model;
+
+use Joomla\CMS\MVC\Model\AdminModel;
+
+\defined('_JEXEC') or die;
+
+class DepotModel extends AdminModel
+{
+	public function getForm($data = [], $loadData = true)
+	{
+		$form = $this->loadForm('com_depot.part', 'part', ['control' => 'jform', 'load_data' => $loadData]);
+
+		if (empty($form)) {
+			return false;
+		}
+
+		return $form;
+	}
+}

admin/src/Model/PartModel.php

@@ -26,4 +26,4 @@ class PartModel extends AdminModel
 
 		return $form;
 	}
-}
+}

admin/src/Table/DepotTable.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * @package		Depot.Administrator
+ * @subpackage	com_depot
+ * @author		Thomas Kuschel <thomas@kuschel.at>
+ * @copyright	(C) 2023 KW4NZ, <https://www.kuschel.at>
+ * @license		GNU General Public License version 2 or later; see LICENSE.md
+ * @since		0.0.2
+ */
+
+namespace KW4NZ\Component\Depot\Administrator\Table;
+
+use Joomla\CMS\Table\Table;
+use Joomla\Database\DatabaseDriver;
+
+\defined('_JEXEC') or die;
+
+class DepotTable extends Table
+{
+	function __construct(DatabaseDriver $db)
+	{
+		parent::__construct('#__depot', 'id', $db);
+	}
+}

admin/src/Table/PartTable.php

@@ -21,4 +21,4 @@ class PartTable extends Table
 	{
 		parent::__construct('#__depot', 'id', $db);
 	}
-}
+}

admin/tmpl/part/default.php

@@ -0,0 +1 @@
+<h2>Welcome to my Depot Component - part!</h2>

admin/tmpl/part/edit.php

@@ -8,17 +8,20 @@
  * @since		0.0.3
  */
 use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Router\Route;
 
-$wa = $this->document->getWebAssetManager();
+//$wa = $this->document->getWebAssetManager();
+//$wa->useScript('keepalive');
+//$wa->useScript('form.validate');
+HTMLHelper::('behavior.formvalidator');
+HTMLHelper::('behavior.keepalive');
 
-$wa->useScript('keepalive');
-$wa->useScript('form.validate');
 ?>
-<form action="<?php echo Route::_('index.php?option=com_depot&layout=edit&id=' . (int) $this->item->id); ?>"
+<form action="<?php echo Route::_('index.php?option=com_depot&view=part&layout=edit&id=' . (int) $this->item->id); ?>"
 	method="post" name="adminForm" id="item-form" class="form-validate">
 
-	<?php echo $this->form->renderField('component_name'); ?>
+	<?php echo $this->form->renderField('titel'); ?>
 
 	<input type="hidden" name="task" value="part.edit" />
-	<?= HTMLHelper::_('form.token'); ?>
+	<?php echo HTMLHelper::_('form.token'); ?>
 </form>

admin/tmpl/parts/default.php

@@ -9,3 +9,4 @@
  */
 ?>
 <h2>Welcome to my Depot Component!</h2>
+Link: <a href="index.php?option=com_depot&view=part&layout=edit">Part</a>