Screen drawing only work unidirectionally

I notice that when sharing the screen or a window it won't let others draw on my screen or even let me enable them to draw on my screen. However, and more interesting, I can draw on other people's screens so it seems like the drawing is only working unidirectionally. Looking at flatseal I can't see any permission I would need to enable so that drawing on my screen works properly.

Have I missed a setting somewhere is this just not possible because of a limitation on the Wayland protocol?

if so is there any xwayland setting I can tweak to get this working?

For reference, I'm on very vanilla, as far as window management and plugins go, Fedora 40 gnome on Wayland.
all the people I share the screen with are running Slack on a Mac and I can draw on their screen fine