How to display a specific form mode in a programmatically displayed form
You need to specify a form operation in the handler section of the custom entity:

/**
 * @ContentEntityType(
 *   id = "property",
 *   handlers = {
 *     "form" = {
 *       "default" = "Drupal\mymodule\Form\MyEntityForm",
 *       "status" = "Drupal\mymodule\Form\MyEntityForm",


You can define multiple operations for the same form class. In this example I used status for the form operation, because this name usually doesn't contain the entity type name.

Then you should be able to use the form mode status in the entity form builder:

\Drupal::service('entity.form_builder')-&gt;getForm($property, 'status')