We are supporting the feature of emojis to react to messages in Whatsapp chats and, you'll also be able to see the client's reaction to a specific chat in Hello-Chat.
Here is the screenshot of the message in which the user reacted to our message on WhatsApp.
And the same can be visible in your Hello-Chat like this:
NOTE: These reactions are only supported by META. If you are using another vendor such as Vonage, 360, etc., you won't be able to see the reactions on Hello chat.