diff --git a/packages/core/src/di/host_tag_name_token.ts b/packages/core/src/di/host_tag_name_token.ts
index 492d42adc8f..3e91e0ec1b2 100644
--- a/packages/core/src/di/host_tag_name_token.ts
+++ b/packages/core/src/di/host_tag_name_token.ts
@@ -34,36 +34,45 @@ import {InternalInjectFlags} from './interface/injector';
  * ```
  * @publicApi
  */
-export const HOST_TAG_NAME = new InjectionToken<string>(ngDevMode ? 'HOST_TAG_NAME' : '');
+export const HOST_TAG_NAME: InjectionToken<string> = /* @__PURE__ */ (() => {
+  // Wrapped in a `@__PURE__` IIFE so this token stays tree-shakable.
+  // If nothing ever injects `HOST_TAG_NAME`, the IIFE result is unused and
+  // the bundler can drop the whole block. If we set `__NG_ELEMENT_ID__` at
+  // the top level instead, the mutation would look like a side effect,
+  // forcing the bundler to keep it even when unused.
+  const HOST_TAG_NAME_TOKEN = new InjectionToken<string>(ngDevMode ? 'HOST_TAG_NAME' : '');
 
-// HOST_TAG_NAME should be resolved at the current node, similar to e.g. ElementRef,
-// so we manually specify __NG_ELEMENT_ID__ here, instead of using a factory.
-// tslint:disable-next-line:no-toplevel-property-access
-(HOST_TAG_NAME as any).__NG_ELEMENT_ID__ = (flags: InternalInjectFlags) => {
-  const tNode = getCurrentTNode();
-  if (tNode === null) {
+  // HOST_TAG_NAME should be resolved at the current node, similar to e.g. ElementRef,
+  // so we manually specify __NG_ELEMENT_ID__ here, instead of using a factory.
+  // tslint:disable-next-line:no-toplevel-property-access
+  (HOST_TAG_NAME_TOKEN as any).__NG_ELEMENT_ID__ = (flags: InternalInjectFlags) => {
+    const tNode = getCurrentTNode();
+    if (tNode === null) {
+      throw new RuntimeError(
+        RuntimeErrorCode.INVALID_INJECTION_TOKEN,
+        ngDevMode &&
+          'HOST_TAG_NAME can only be injected in directives and components ' +
+            'during construction time (in a class constructor or as a class field initializer)',
+      );
+    }
+    if (tNode.type & TNodeType.Element) {
+      return tNode.value;
+    }
+    if (flags & InternalInjectFlags.Optional) {
+      return null;
+    }
     throw new RuntimeError(
       RuntimeErrorCode.INVALID_INJECTION_TOKEN,
       ngDevMode &&
-        'HOST_TAG_NAME can only be injected in directives and components ' +
-          'during construction time (in a class constructor or as a class field initializer)',
+        `HOST_TAG_NAME was used on ${getDevModeNodeName(
+          tNode,
+        )} which doesn't have an underlying element in the DOM. ` +
+          `This is invalid, and so the dependency should be marked as optional.`,
     );
-  }
-  if (tNode.type & TNodeType.Element) {
-    return tNode.value;
-  }
-  if (flags & InternalInjectFlags.Optional) {
-    return null;
-  }
-  throw new RuntimeError(
-    RuntimeErrorCode.INVALID_INJECTION_TOKEN,
-    ngDevMode &&
-      `HOST_TAG_NAME was used on ${getDevModeNodeName(
-        tNode,
-      )} which doesn't have an underlying element in the DOM. ` +
-        `This is invalid, and so the dependency should be marked as optional.`,
-  );
-};
+  };
+
+  return HOST_TAG_NAME_TOKEN;
+})();
 
 function getDevModeNodeName(tNode: TNode) {
   if (tNode.type & TNodeType.ElementContainer) {
diff --git a/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json b/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json
index 9e887cdb6c5..c2abdc3d27c 100644
--- a/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json
@@ -118,7 +118,6 @@
       "HEADER_OFFSET",
       "HOST",
       "HOST_ATTR",
-      "HOST_TAG_NAME",
       "HYDRATION",
       "ID",
       "INJECTOR",
diff --git a/packages/core/test/bundling/defer/bundle.golden_symbols.json b/packages/core/test/bundling/defer/bundle.golden_symbols.json
index 4f5a7a26e3d..dd802868d1c 100644
--- a/packages/core/test/bundling/defer/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/defer/bundle.golden_symbols.json
@@ -67,6 +67,8 @@
       "shimStylesContent"
     ],
     "lazy": [
+      "DeferComponent",
+      "_DeferComponent",
       "AFTER_RENDER_SEQUENCES_TO_ADD",
       "ANIMATIONS",
       "APP_BOOTSTRAP_LISTENER",
@@ -141,7 +143,6 @@
       "FLAGS",
       "HEADER_OFFSET",
       "HOST",
-      "HOST_TAG_NAME",
       "HYDRATE_TRIGGER_CLEANUP_FNS",
       "HYDRATION",
       "ID",
@@ -792,9 +793,7 @@
       "wasLastNodeCreated",
       "writeDirectClass",
       "writeDirectStyle",
-      "writeToDirectiveInput",
-      "DeferComponent",
-      "_DeferComponent"
+      "writeToDirectiveInput"
     ]
   }
 }
\ No newline at end of file
diff --git a/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json b/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json
index 66b475e98ec..ff99997b5bc 100644
--- a/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json
@@ -120,7 +120,6 @@
       "HEADER_OFFSET",
       "HOST",
       "HOST_ATTR",
-      "HOST_TAG_NAME",
       "HYDRATION",
       "ID",
       "INJECTOR",
diff --git a/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json b/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json
index afbd06a3759..b65037e710d 100644
--- a/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json
@@ -114,7 +114,6 @@
       "HEADER_OFFSET",
       "HOST",
       "HOST_ATTR",
-      "HOST_TAG_NAME",
       "HYDRATION",
       "ID",
       "INJECTOR",
diff --git a/packages/core/test/bundling/hydration/bundle.golden_symbols.json b/packages/core/test/bundling/hydration/bundle.golden_symbols.json
index 85a090320cd..6d4cfbf8658 100644
--- a/packages/core/test/bundling/hydration/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/hydration/bundle.golden_symbols.json
@@ -93,7 +93,6 @@
       "HEADER_OFFSET",
       "HOST",
       "HOST_ATTR",
-      "HOST_TAG_NAME",
       "HTTP_ROOT_INTERCEPTOR_FNS",
       "HTTP_TRANSFER_CACHE_ORIGIN_MAP",
       "HYDRATION",
diff --git a/packages/core/test/bundling/router/bundle.golden_symbols.json b/packages/core/test/bundling/router/bundle.golden_symbols.json
index 20c371e262b..b101340c70b 100644
--- a/packages/core/test/bundling/router/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/router/bundle.golden_symbols.json
@@ -113,7 +113,6 @@
       "HEADER_OFFSET",
       "HOST",
       "HOST_ATTR",
-      "HOST_TAG_NAME",
       "HYDRATION",
       "HistoryStateManager",
       "HostAttributeToken",
diff --git a/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json b/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json
index 2bccee44295..5096f1ddd15 100644
--- a/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json
@@ -80,7 +80,6 @@
       "HEADER_OFFSET",
       "HOST",
       "HOST_ATTR",
-      "HOST_TAG_NAME",
       "HYDRATION",
       "HelloWorld",
       "ID",