After a Teams meeting ends, you and others in your organization can continue to build out a whiteboard that your team worked on during the meeting.
Access a whiteboard created during a meeting or call: After a Teams meeting or call ends, go to the home screen of the Whiteboard app. A thumbnail of the whiteboard that was created during that session appears on this screen. Click the thumbnail to open it in the Whiteboard app.
Access a tabbed whiteboard that was shared during a meeting or call: If you shared a whiteboard that was a tab in a Teams channel or chat, simply navigate back to the channel or chat and click the tab for the whiteboard. It will now have any changes that were made to it during the meeting or call.