Issue #3355983: Support the Entity Form/Display Field Label module

src/Plugin/Field/FieldFormatter/PatternOneForAllFormatter.php

@@ -185,6 +185,11 @@ class PatternOneForAllFormatter extends FieldWrapperBase implements ContainerFac
             $fields[$field['destination']][] = $items->getFieldDefinition()->getThirdPartySetting('field_display_label', 'display_label');
           }
         }
+        elseif ($field['source'] == '_entity_form_field_label') {
+          if ($this->moduleHandler->moduleExists('entity_form_field_label')) {
+            $fields[$field['destination']][] = $this->getThirdPartySetting('entity_form_field_label', 'new_label');
+          }
+        }
         elseif ($field['source'] == '_formatted') {
           $field_output = $this->getFieldOutput($items, $langcode);
           // Take the element children from the field output and return them.