Any way to get a Blocs Theme from Wordpress back into Blocs?

I have a theme made with Blocs in a Wordpress project. Is there a way to get this theme back into Blocs to work on it without having any original Blocs project data? How to do this?

As far as I know the WordPress implementation in Blocs by heart, it isn’t possible. You’d always need the original Blocs project file.