Code Block Editor Missing

Hello, I am trying to find the code block editor, but I cannot find it anymore. I used to be able to be able to activate it by clicking on the cross arrows icon on the sidebar of a code piece, but now it seems to have been removed with the ‘Add package’ button in its place.

It was very useful to have a full screen view of the code to test my code there and to view the console output. I’m using the first party cloud version of AP, has it been removed?

I have been struggling to find it and run tests… Can this be brought back?