This looks like our OneNote... nice share Siunie Sutjahjo !
We've been using Teams as a platform for virtual events for a couple of years now. Our playbook is solid now and just finishing our 12th event - now at almost 1000 presentations and over 5500 attendees total. We run our events in a team dedicated to the event (usually multi-day). We make liberal use of the underlying SharePoint site - Microsoft Lists and SharePoint pages make great Teams tabs for the agenda and speaker information - you can link straight into a channel (or "room") or to a tab in a channel (speaker/exhibitor/sponsor content). When there are concurrent sessions/meetings active, running in their subject matter based channels, users are amazed how easy it is to move between them - just like at a real conference center (we've had 50 concurrent meetings running...) And don't forget SharePoint spaces - a great way to highlight speaker content and more. Our trick is to explain to the attendees that Teams is your virtual conference center - you virtually "enter" the Team for the day and all the info you need is at your fingertips. Your attendees aren't spending their time in email searching for links to individual meetings for which they had to individually register. If you are running a bunch of siloed, disconnected meetings, consider running the event in a Team. You can run a few thousand attendee events for a few dollars a month vs $15K to $64K on other platforms. Can't wait to see what we can do with Mesh. A few links on how we run our events.