Announcements or pinned chat?

So the easiest workaround for a banner or a pinned chat is to display a text banner in the meeting using third party closed captions. This is a message that can be displayed to all participants regardless of when they joined the meeting. This would save you a lot of time so you are not entering the same announcement in the chat multiple times each meeting. You can set this up using APIs or if you are not a developer there is a Zoom app, Salepager, that lets you display a caption banner that is pinned to the meeting so that even latecomers will see the message.