It was then demonstrated with these screenshots. It was well explained by someone else in this post.
My hope is that Outlook tasks and OneNote are changed in future updates to sync with ToDo instead - this might fix the problem, but its a dealbreaker for me at the moment. It turns out OneNote sync with Outlook tasks only works on the default Outlook task folder. When you create an Outlook Task in OneNote, the link is broken when the task is moved out of the default Outlook task folder into its correct folder to sync with Microsoft ToDo. However, if the process starts (as it often will) by planning in OneNote. (This is a change because I used to demonstrate Outlook tasks using categories, but Microsoft Todo doesn't sync with Outlook categories, only Outlook task folders.) Microsoft Todo creates lists which nicely sync with Outlook task folders. I include Outlook/OneNote training in my productivity workshops and looking forward to integrating Microsoft ToDo into the training. I have a major flaw (unless I'm not understanding it correctly).