Launch Application into split view *by splitting current native fullscreen*

Feature Requests
1

Hi,
currently there is an option to Launch an Application.
However, I am using native full screen on macOS 13 a lot and it would be great to be able to launch another app right inside that window as a split screen.

Currently, I launch the app I want using a keyboard shortcut, and then have to drag and drop it into the window I want. Would be great if that last step could be automated by bettertouchtool, as many other steps are.

Thank you and please upvote!
Marvin

2

So I managed to solve this for my use case of splitting an open firefox window into two pieces, moving one tab to the side.

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First off, you need to exit the fullscreen, because initiating native split only works from non-fullscreen. Then using the firefox addon "Detach Tab", you detach the tab (using the addon's shortcute cmd+shift+space) you want to have split to the other side from the remaining firefox window.
Then you launch split view.
The last step is manual where you select the other firefox window.

You need to add a minimum of 0.55sec steps between the commands for them to work as intended.