Please visit the Zoom App Marketplace, and find Heyyo Chat. Here's a link.
Simply open Heyyo Chat during your meeting to create a new chat (if you are the host) or join a chat (if you are attending).
Any time, you can re-visit old conversations by going to your main Zoom window or visiting https://heyyo.chat
Login to your Zoom Account and navigate to the Zoom App Marketplace
Click Manage > Installed Apps or search for Heyyo