There is no standard syntax for Scratch, so when ChatGPT generates pseudocode for Scratch it can use different syntax at different times.
As you said, ChatGPT can’t parse any Scratch project directly, so we believe it has only seen pseudocode on other websites that other people write to represent Scratch. But that should be enough for it to understand how it works.
On top of that, CreatiCode Scratch introduces many new tools, such as blocks for debugging, 3D, AI and AR projects. These are mostly published after the Sep 2021 cutoff, so we have to teach ChatGPT how to use them.