This request is still on the backlog.
We acknowledge the demand for this capability and are exploring the best possible solutions to enable this.
Similar to how we can do it now in SfB calls - especially when you are using two screens. We can pop the video out on to one screen and the presentation/screen sharing on to the other screen
Thanks to everyone who volunteered for testing the Office 365 group calendar. The TAP team will be reaching out as we are closer to being ready.