Context variable for hook_field_widget_complete_form_alter does not contain "delta" property

API page: https://api.drupal.org/api/drupal/core%21modules%21field%21field.api.php...

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The documentation about hook is not 100% accurate, the variable context doesn't contain the property delta for hook_field_widget_complete_form_alter. It could be seen here https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Field%21W... that in the class that triggers the hook, the property delta is not set: see https://git.drupalcode.org/project/drupal/-/blob/11.x/core/lib/Drupal/Co...

For the hook_field_widget_single_element_form the context is correct though