diff --git a/core/modules/layout_builder/src/Plugin/DataType/SectionData.php b/core/modules/layout_builder/src/Plugin/DataType/SectionData.php
index 9acf046b0a41f88fb5529adaf3dcda4c77c3734a..67c60801bc34ebe29160ed6e1d78f6cd8994339d 100644
--- a/core/modules/layout_builder/src/Plugin/DataType/SectionData.php
+++ b/core/modules/layout_builder/src/Plugin/DataType/SectionData.php
@@ -31,6 +31,9 @@ class SectionData extends TypedData {
    * {@inheritdoc}
    */
   public function setValue($value, $notify = TRUE) {
+    if (is_array($value)) {
+      $value = Section::fromArray($value);
+    }
     if ($value && !$value instanceof Section) {
       throw new \InvalidArgumentException(sprintf('Value assigned to "%s" is not a valid section', $this->getName()));
     }
diff --git a/core/modules/layout_builder/tests/src/Kernel/SectionDataTest.php b/core/modules/layout_builder/tests/src/Kernel/SectionDataTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..77972ea0d96b20989fd72b88befe782c803c8203
--- /dev/null
+++ b/core/modules/layout_builder/tests/src/Kernel/SectionDataTest.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\layout_builder\Kernel;
+
+use Drupal\Core\TypedData\DataDefinition;
+use Drupal\Core\TypedData\TypedDataManagerInterface;
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\layout_builder\Section;
+
+/**
+ * @coversDefaultClass \Drupal\layout_builder\Plugin\DataType\SectionData
+ *
+ * @group layout_builder
+ */
+class SectionDataTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['layout_builder'];
+
+  /**
+   * @covers ::setValue
+   */
+  public function testSetArrayValue(): void {
+    $definition = DataDefinition::create('layout_section');
+    $data = $this->container->get(TypedDataManagerInterface::class)
+      ->create($definition, name: 'test_section');
+
+    // If an array is passed, it's converted to a Section object.
+    $data->setValue([]);
+    $this->assertInstanceOf(Section::class, $data->getValue());
+    // Anything else should raise an exception.
+    $this->expectExceptionMessage('Value assigned to "test_section" is not a valid section');
+    $data->setValue('[]');
+  }
+
+}
diff --git a/core/tests/Drupal/FunctionalTests/DefaultContent/ContentImportTest.php b/core/tests/Drupal/FunctionalTests/DefaultContent/ContentImportTest.php
index c177b503af0365a6101b5b261b052618f20801d9..17164828ed37b36e5acd28164fad35ddc638b76d 100644
--- a/core/tests/Drupal/FunctionalTests/DefaultContent/ContentImportTest.php
+++ b/core/tests/Drupal/FunctionalTests/DefaultContent/ContentImportTest.php
@@ -13,6 +13,7 @@
 use Drupal\Core\DefaultContent\Importer;
 use Drupal\Core\DefaultContent\ImportException;
 use Drupal\Core\DefaultContent\InvalidEntityException;
+use Drupal\Core\Entity\EntityDisplayRepositoryInterface;
 use Drupal\Core\Entity\EntityRepositoryInterface;
 use Drupal\Core\File\FileExists;
 use Drupal\Core\Url;
@@ -22,6 +23,7 @@
 use Drupal\FunctionalTests\Core\Recipe\RecipeTestTrait;
 use Drupal\language\Entity\ConfigurableLanguage;
 use Drupal\language\Entity\ContentLanguageSettings;
+use Drupal\layout_builder\Section;
 use Drupal\media\MediaInterface;
 use Drupal\menu_link_content\MenuLinkContentInterface;
 use Drupal\node\NodeInterface;
@@ -57,6 +59,7 @@ class ContentImportTest extends BrowserTestBase {
     'block_content',
     'content_translation',
     'entity_test',
+    'layout_builder',
     'media',
     'menu_link_content',
     'node',
@@ -108,6 +111,13 @@ protected function setUp(): void {
 
     $this->contentDir = $this->getDrupalRoot() . '/core/tests/fixtures/default_content';
     \Drupal::service('file_system')->copy($this->contentDir . '/file/druplicon_copy.png', $this->publicFilesDirectory . '/druplicon_copy.png', FileExists::Error);
+
+    // Enable Layout Builder for the Page content type, with custom overrides.
+    \Drupal::service(EntityDisplayRepositoryInterface::class)
+      ->getViewDisplay('node', 'page')
+      ->enableLayoutBuilder()
+      ->setOverridable()
+      ->save();
   }
 
   /**
@@ -259,6 +269,15 @@ private function assertContentWasImported(): void {
     $translation = $node->getTranslation('fr');
     $this->assertSame('Perdu en traduction', $translation->label());
     $this->assertSame("Içi c'est la version français.", $translation->body->value);
+
+    // Layout data should be imported.
+    $node = $entity_repository->loadEntityByUuid('node', '32650de8-9edd-48dc-80b8-8bda180ebbac');
+    $this->assertInstanceOf(NodeInterface::class, $node);
+    $section = $node->layout_builder__layout[0]->section;
+    $this->assertInstanceOf(Section::class, $section);
+    $this->assertCount(2, $section->getComponents());
+    $this->assertSame('system_powered_by_block', $section->getComponent('03b45f14-cf74-469a-8398-edf3383ce7fa')->getPluginId());
+
   }
 
 }
diff --git a/core/tests/fixtures/default_content/node/32650de8-9edd-48dc-80b8-8bda180ebbac.yml b/core/tests/fixtures/default_content/node/32650de8-9edd-48dc-80b8-8bda180ebbac.yml
new file mode 100644
index 0000000000000000000000000000000000000000..e2cc0400c2c5ad16cd6ab6a01f8350bd8393a2e7
--- /dev/null
+++ b/core/tests/fixtures/default_content/node/32650de8-9edd-48dc-80b8-8bda180ebbac.yml
@@ -0,0 +1,60 @@
+_meta:
+  version: '1.0'
+  entity_type: node
+  uuid: 32650de8-9edd-48dc-80b8-8bda180ebbac
+  bundle: page
+  default_langcode: en
+default:
+  revision_uid:
+    -
+      target_id: 1
+  status:
+    -
+      value: true
+  uid:
+    -
+      target_id: 1
+  title:
+    -
+      value: 'Layout override'
+  created:
+    -
+      value: 1733930395
+  promote:
+    -
+      value: true
+  sticky:
+    -
+      value: false
+  revision_translation_affected:
+    -
+      value: true
+  layout_builder__layout:
+    -
+      section:
+        layout_id: layout_onecol
+        layout_settings:
+          label: ''
+        components:
+          199f7eea-3e6e-4a91-bf5e-7b1d6f13fecd:
+            uuid: 199f7eea-3e6e-4a91-bf5e-7b1d6f13fecd
+            region: content
+            configuration:
+              id: 'extra_field_block:node:test:links'
+              label_display: '0'
+              context_mapping:
+                entity: layout_builder.entity
+            weight: 1
+            additional: {  }
+          03b45f14-cf74-469a-8398-edf3383ce7fa:
+            uuid: 03b45f14-cf74-469a-8398-edf3383ce7fa
+            region: content
+            configuration:
+              id: system_powered_by_block
+              label: 'Powered by Drupal'
+              label_display: 0
+              provider: system
+              context_mapping: {  }
+            weight: 0
+            additional: {  }
+        third_party_settings: {  }