Meeting Extension Apps Integration - Fullscreen? Like Invision/MS Whiteboard?

Within teams you can develop meeting extension apps (apps you can use live within a meeting), however they appear to be limited to a 320 pixel side panel.

1. Is there anyway to increase the size of this side panel in development, to integrate a visual webapp?

2. is there a way to integrate in fullscreen for meetings, like InVision or Microsoft whiteboard does? (Image attached)

- I want each person to be able to interact with a visual whiteboard app, that needs more visual real-estate during the meeting in real-time

https://techcommunity.microsoft.com/t5/public-sector-blog/meetings-extensibility-in-microsoft-teams-meetings/ba-p/2111965