Since Google Chat is a Progressive Web App (PWA), you don’t go to the Mac App Store to find it. Instead, you install it through your web browser. Open on your MacBook. Navigate to google.com and sign in.
Google Hangouts was officially retired by Google in 2022 and replaced by Google Chat. Because of this, there is no longer a standalone "Google Hangouts" app available for download on macOS. google hangouts download for macbook
If you are looking for the modern equivalent to stay connected with your contacts on your MacBook, here is everything you need to know about the transition and how to get the current software. The Evolution: From Hangouts to Google Chat Since Google Chat is a Progressive Web App
Troubleshooting steps if the in your browser. Navigate to google
Instructions on how to to the new app.
Google transitioned all Hangouts users to Google Chat to provide a more integrated experience within Workspace. While the "Hangouts" brand is gone, the functionality—including direct messaging, group chats, and video calls—has moved to the new platform. How to "Download" Google Chat on MacBook
Start a high-definition video call with one click using the built-in Google Meet button.