Search Navigation not visible if default category has "Display Mode" other than "page"

app/code/Magento/LayeredNavigation/Block/Navigation.php

@@ -1,13 +1,14 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2024 Adobe
+ * All Rights Reserved.
  */
 namespace Magento\LayeredNavigation\Block;
 
-use Magento\Framework\View\Element\Template;
-use Magento\Catalog\Model\ResourceModel\Product\Collection;
 use Magento\Catalog\Block\Product\ProductList\Toolbar;
+use Magento\Catalog\Model\ResourceModel\Product\Collection;
+use Magento\Framework\App\Request\Http;
+use Magento\Framework\View\Element\Template;
 
 /**
  * Catalog layered navigation view block
@@ -23,8 +24,6 @@ class Navigation extends \Magento\Framework\View\Element\Template
     private const PRODUCT_LISTING_TOOLBAR_BLOCK = 'product_list_toolbar';
 
     /**
-     * Catalog layer
-     *
      * @var \Magento\Catalog\Model\Layer
      */
     protected $_catalogLayer;
@@ -122,7 +121,12 @@ public function getFilters()
      */
     public function canShowBlock()
     {
-        return $this->getLayer()->getCurrentCategory()->getDisplayMode() !== \Magento\Catalog\Model\Category::DM_PAGE
+        /** @var Http $request */
+        $request = $this->getRequest();
+        return (
+            $this->getLayer()->getCurrentCategory()->getDisplayMode() !== \Magento\Catalog\Model\Category::DM_PAGE
+            || $request->getRouteName() === 'catalogsearch'
+        )
             && $this->visibilityFlag->isEnabled($this->getLayer(), $this->getFilters());
     }
 

app/code/Magento/LayeredNavigation/Test/Unit/Block/NavigationTest.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2024 Adobe
+ * All Rights Reserved.
  */
 declare(strict_types=1);
 
@@ -12,6 +12,7 @@
 use Magento\Catalog\Model\Layer\AvailabilityFlagInterface;
 use Magento\Catalog\Model\Layer\FilterList;
 use Magento\Catalog\Model\Layer\Resolver;
+use Magento\Framework\App\Request\Http;
 use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;
 use Magento\Framework\View\Element\AbstractBlock;
 use Magento\Framework\View\LayoutInterface;
@@ -41,6 +42,11 @@ class NavigationTest extends TestCase
      */
     protected $visibilityFlagMock;
 
+    /**
+     * @var MockObject
+     */
+    protected $requestMock;
+
     /**
      * @var Navigation
      */
@@ -54,6 +60,10 @@ protected function setUp(): void
         $this->catalogLayerMock = $this->createMock(Layer::class);
         $this->filterListMock = $this->createMock(FilterList::class);
         $this->visibilityFlagMock = $this->getMockForAbstractClass(AvailabilityFlagInterface::class);
+        $this->requestMock = $this->getMockBuilder(Http::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getRouteName'])
+            ->getMock();
 
         /** @var MockObject|Resolver $layerResolver */
         $layerResolver = $this->getMockBuilder(Resolver::class)
@@ -70,7 +80,8 @@ protected function setUp(): void
             [
                 'layerResolver' => $layerResolver,
                 'filterList' => $this->filterListMock,
-                'visibilityFlag' => $this->visibilityFlagMock
+                'visibilityFlag' => $this->visibilityFlagMock,
+                '_request' => $this->requestMock
             ]
         );
         $this->layoutMock = $this->getMockForAbstractClass(LayoutInterface::class);
@@ -137,7 +148,7 @@ public function testCanShowBlock(): void
      * @return void
      * @dataProvider canShowBlockDataProvider
      */
-    public function testCanShowBlockWithDifferentDisplayModes(string $mode, bool $result): void
+    public function testCanShowBlockWithDifferentDisplayModes(string $mode, string $routeName, bool $result): void
     {
         $filters = ['To' => 'be', 'or' => 'not', 'to' => 'be'];
 
@@ -154,6 +165,8 @@ public function testCanShowBlockWithDifferentDisplayModes(string $mode, bool $re
 
         $category = $this->createMock(Category::class);
         $this->catalogLayerMock->expects($this->atLeastOnce())->method('getCurrentCategory')->willReturn($category);
+        $this->requestMock->expects($this->any())->method('getRouteName')->willReturn($routeName);
+
         $category->expects($this->once())->method('getDisplayMode')->willReturn($mode);
         $this->assertEquals($result, $this->model->canShowBlock());
     }
@@ -166,14 +179,32 @@ public static function canShowBlockDataProvider(): array
         return [
             [
                 Category::DM_PRODUCT,
+                'catalog',
                 true
             ],
             [
                 Category::DM_PAGE,
+                'catalog',
                 false
             ],
             [
                 Category::DM_MIXED,
+                'catalog',
+                true
+            ],
+            [
+                Category::DM_PRODUCT,
+                'catalogsearch',
+                true
+            ],
+            [
+                Category::DM_PAGE,
+                'catalogsearch',
+                true
+            ],
+            [
+                Category::DM_MIXED,
+                'catalogsearch',
                 true
             ],
         ];