Context: Windows on Niri doesn’t span across monitors, and the dev doesn’t seem very interested in adding this feature (https://github.com/YaLTeR/niri/issues/2309)

I am trying to setup Flameshot on Niri. While Flameshot’s window spawns with the full 2-monitor dimensions, it can only appear on one screen due to the limitation of Niri. I currently have a temporary-solution script where I position the window differently based on which monitor my cursor is on.

Is there a way I can split the Flameshot window in 2 so it can appear on both screens? I don’t know if there exists some kiosk compositors like cage that does this.