If the Raise Hand button is disabled, it's because your instructor disabled it. You won't be able to go up to the podium to speak. If the class is in Room Mode, you can unmute your mic and address the entire class from the Gallery. You can always send a direct chat message to the instructor or staff if you need assistance.
Note: When the Raise Hand button is disabled, you won't be able to share your screen with the entire class, only with your table.
Raise Hand button disabled
Raise Hand button enabled
Need more help? Contact Support.