A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Dear Eve,
Good day and thanks for posting your question in our forum.
Per description, you would like more than one person to be able to draw on a slide simultaneously, using a multi-touch display whiteboard.
I have also searched a lot, and I cannot find such setting in PowerPoint for Android, I would also like you to suggest sending feedback to PowerPoint Feedback Community PowerPoint · Community (microsoft.com)
So that our developers could investigate this request and review your request.
We feel your pain due to this limitation and we are sorry for it. However, we appreciate your understanding.
Appreciate your understanding and patience.
Sincerely,
AJ RAJ| Microsoft Community Moderator