diff --git a/lib/shared/inline-engagement-utils.js b/lib/shared/inline-engagement-utils.js
--- a/lib/shared/inline-engagement-utils.js
+++ b/lib/shared/inline-engagement-utils.js
@@ -1,5 +1,6 @@
 // @flow
 
+import type { ReactionInfo } from '../selectors/chat-selectors.js';
 import type { ThreadInfo } from '../types/thread-types.js';
 
 function getInlineEngagementSidebarText(threadInfo: ?ThreadInfo): string {
@@ -10,4 +11,15 @@
   return `${repliesCount} ${repliesCount > 1 ? 'replies' : 'reply'}`;
 }
 
-export { getInlineEngagementSidebarText };
+function reactionsToRawString(reactions: ReactionInfo): string {
+  const reactionStringParts = [];
+
+  for (const reaction in reactions) {
+    const reactionInfo = reactions[reaction];
+    reactionStringParts.push(`${reaction}${reactionInfo.users.length}`);
+  }
+
+  return reactionStringParts.join('');
+}
+
+export { getInlineEngagementSidebarText, reactionsToRawString };
diff --git a/native/chat/chat-item-height-measurer.react.js b/native/chat/chat-item-height-measurer.react.js
--- a/native/chat/chat-item-height-measurer.react.js
+++ b/native/chat/chat-item-height-measurer.react.js
@@ -3,6 +3,10 @@
 import invariant from 'invariant';
 import * as React from 'react';
 
+import {
+  getInlineEngagementSidebarText,
+  reactionsToRawString,
+} from 'lib/shared/inline-engagement-utils.js';
 import { messageID } from 'lib/shared/message-utils.js';
 import {
   messageTypes,
@@ -29,13 +33,16 @@
   if (item.itemType !== 'message') {
     return null;
   }
-  const { messageInfo } = item;
+  const { messageInfo, threadCreatedFromMessage, reactions } = item;
+
   if (messageInfo.type === messageTypes.TEXT) {
     return JSON.stringify({ text: messageInfo.text });
   } else if (item.robotext) {
     const { threadID } = item.messageInfo;
     return JSON.stringify({
       robotext: entityTextToRawString(item.robotext, { threadID }),
+      sidebar: getInlineEngagementSidebarText(threadCreatedFromMessage),
+      reactions: reactionsToRawString(reactions),
     });
   }
   return null;