Introduce `Window` option to contain multiple `Viewports` with a focused `Control` by Sauermann · Pull Request #89772 · godotengine/godot Introduce Window option to contain multiple Viewports with a focused Control This PR introduces an option Window.multi_viewport_focus to allow all contained Viewports to keep their focused Control ...

There's a pull request going - updated last month github.com/godotengine/...

Randomly scrolling through my feed - and saw this. I had completely forgotten that I posted it 😅 Godot has become more popular since then, hopefully some one bright minded will make it happen.