No, progress is not automatically transitioned so you have a couple of options.
All the existing content remains in the new ‘Intro to Sandbox’ course therefore you can re-do the Knowledge Check questions and Session Quizzes for repeated sections. And then complete the remainder of the course using the updated and easier to use platform.
The old platform will remain for a limited time after October 19th 2021 so you will have some time to complete the training if you need.