diff --git a/openedx/core/djangoapps/content/search/handlers.py b/openedx/core/djangoapps/content/search/handlers.py
index 085387d336b1..46b015367a0d 100644
--- a/openedx/core/djangoapps/content/search/handlers.py
+++ b/openedx/core/djangoapps/content/search/handlers.py
@@ -179,13 +179,19 @@ def library_collection_updated_handler(**kwargs) -> None:
         log.error("Received null or incorrect data for event")
         return
 
-    # Update collection index synchronously to make sure that search index is updated before
-    # the frontend invalidates/refetches index.
-    # See content_library_updated_handler for more details.
-    update_library_collection_index_doc.apply(args=[
-        str(library_collection.library_key),
-        library_collection.collection_key,
-    ])
+    if library_collection.lazy:
+        update_library_collection_index_doc.delay(
+            str(library_collection.library_key),
+            library_collection.collection_key,
+        )
+    else:
+        # Update collection index synchronously to make sure that search index is updated before
+        # the frontend invalidates/refetches index.
+        # See content_library_updated_handler for more details.
+        update_library_collection_index_doc.apply(args=[
+            str(library_collection.library_key),
+            library_collection.collection_key,
+        ])
 
 
 @receiver(CONTENT_OBJECT_ASSOCIATIONS_CHANGED)
diff --git a/openedx/core/djangoapps/content_libraries/api.py b/openedx/core/djangoapps/content_libraries/api.py
index 07d07222234f..1ba00ac7122c 100644
--- a/openedx/core/djangoapps/content_libraries/api.py
+++ b/openedx/core/djangoapps/content_libraries/api.py
@@ -80,6 +80,7 @@
 from openedx_events.content_authoring.data import (
     ContentLibraryData,
     LibraryBlockData,
+    LibraryCollectionData,
 )
 from openedx_events.content_authoring.signals import (
     CONTENT_LIBRARY_CREATED,
@@ -88,6 +89,7 @@
     LIBRARY_BLOCK_CREATED,
     LIBRARY_BLOCK_DELETED,
     LIBRARY_BLOCK_UPDATED,
+    LIBRARY_COLLECTION_UPDATED,
 )
 from openedx_learning.api import authoring as authoring_api
 from openedx_learning.api.authoring_models import Collection, Component, MediaType, LearningPackage, PublishableEntity
@@ -1294,9 +1296,16 @@ def set_library_component_collections(
         created_by=created_by,
     )
 
-    from ..content.search.tasks import update_library_collection_index_doc
+    # For each collection, trigger LIBRARY_COLLECTION_UPDATED signal and set lazy=True to trigger
+    # collection indexing asynchronously.
     for collection in affected_collections:
-        update_library_collection_index_doc.delay(str(library_key), collection.key)
+        LIBRARY_COLLECTION_UPDATED.send_event(
+            library_collection=LibraryCollectionData(
+                library_key=library_key,
+                collection_key=collection.key,
+                lazy=True,
+            )
+        )
 
     return component
 
diff --git a/openedx/core/djangoapps/content_libraries/tests/test_api.py b/openedx/core/djangoapps/content_libraries/tests/test_api.py
index 9ab60a2c9d26..4e49bff8c9f1 100644
--- a/openedx/core/djangoapps/content_libraries/tests/test_api.py
+++ b/openedx/core/djangoapps/content_libraries/tests/test_api.py
@@ -510,10 +510,11 @@ def test_update_collection_components_from_wrong_library(self):
             )
             assert self.lib1_problem_block["id"] in str(exc.exception)
 
-    @mock.patch('openedx.core.djangoapps.content.search.api.upsert_library_collection_index_doc')
-    def test_set_library_component_collections(self, mock_update_collection_index_doc):
+    def test_set_library_component_collections(self):
         event_receiver = mock.Mock()
         CONTENT_OBJECT_ASSOCIATIONS_CHANGED.connect(event_receiver)
+        collection_update_event_receiver = mock.Mock()
+        LIBRARY_COLLECTION_UPDATED.connect(collection_update_event_receiver)
         assert not list(self.col2.entities.all())
         component = api.get_component_from_usage_key(UsageKey.from_string(self.lib2_problem_block["id"]))
 
@@ -536,11 +537,27 @@ def test_set_library_component_collections(self, mock_update_collection_index_do
             },
             event_receiver.call_args_list[0].kwargs,
         )
-        self.assertListEqual(
-            list(mock_update_collection_index_doc.call_args_list[0][0]),
-            [self.lib2.library_key, self.col2.key]
+        self.assertDictContainsSubset(
+            {
+                "signal": LIBRARY_COLLECTION_UPDATED,
+                "sender": None,
+                "library_collection": LibraryCollectionData(
+                    self.lib2.library_key,
+                    collection_key=self.col2.key,
+                    lazy=True,
+                ),
+            },
+            collection_update_event_receiver.call_args_list[0].kwargs,
         )
-        self.assertListEqual(
-            list(mock_update_collection_index_doc.call_args_list[1][0]),
-            [self.lib2.library_key, self.col3.key]
+        self.assertDictContainsSubset(
+            {
+                "signal": LIBRARY_COLLECTION_UPDATED,
+                "sender": None,
+                "library_collection": LibraryCollectionData(
+                    self.lib2.library_key,
+                    collection_key=self.col3.key,
+                    lazy=True,
+                ),
+            },
+            collection_update_event_receiver.call_args_list[1].kwargs,
         )