Issue #3340664 by capysara: Support mapping all webform composite elements

modules/salesforce_webform/src/Plugin/SalesforceMappingField/WebformElements.php

@@ -85,8 +85,16 @@ class WebformElements extends SalesforceMappingFieldPluginBase {
       else {
         $value = $entity->getElementData($main_element_name);
         if ($value && isset($element_parts[1])) {
-          $value = $value[$element_parts[1]];
+          // Flatten the array if nested, e.g., webform custom composite.
+          if (is_array($value) && isset($value[0])) {
+            $flattened = array_reduce($value, 'array_merge', []);
+            $value = $flattened[$element_parts[1]];
+          }
+          else {
+            $value = $value[$element_parts[1]];
+          }
         }
+
         return $value;
       }
     }
@@ -138,7 +146,7 @@ class WebformElements extends SalesforceMappingFieldPluginBase {
 
     // Loop over every field on the webform.
     foreach ($webform_elements as $element_id => $element) {
-      if (in_array($element['#type'], ['webform_address', 'webform_name'])) {
+      if (!empty($element['#webform_composite_elements'])) {
         $element = $webform->getElement($element_id, TRUE);
         foreach ($element['#webform_composite_elements'] as $sub_element) {
           $options[$sub_element['#webform_composite_key']] = $element['#title'] . ': ' . (string) $sub_element['#title'];