Resize shared screen

I have one screen. Not only that, I also have a bad eye sight. The other day I was in vc with my friends and they had their camera on and shared their screens at the same time. I tried to resize the shared screen to I can have a bigger display and enjoy the game more while I see my friends but that's not possible. Why don't we have that yet? free scaling for all windows? I hope you guys consider that in your next update if possible.