You can head this way to learn more about the beta program for the Messages app.
In addition to announcing end-to-end encryption for group chats, Google also announced that the Messages app will soon let users react to RCS (Rich Communication Services) messages with any emoji, similar to WhatsApp.Apple refuses to adopt RCS and continues to rely on SMS when people with iPhones message people with Android phones, which means their texting is stuck in the 1990s.".
The Mountain View-based internet search giant launched the #GetTheMessage campaign a few months ago, calling for Apple to adopt RCS, but the Cupertino-based tech giant has been quite adamant and stubborn on its stance, with Apple CEO Tim Cook saying he would rather convert Android users to iPhones.Even now Google is pushing it because they replace Rcs servers with google servers they kill idea of RCS and now its just Whatsapp version of Google
Android app