Here’s a way to easily feed notes from Notability on an iPad into Canvas.
You would need to choose your intermediary service — I like Dropbox, so I’ll use that. I already have Notability set up to automatically sync notes to Dropbox. This means that I already have a Dropbox folder full of all my of notes, organized into folders by subject (in Notability’s slightly idiosyncratic Category/Subject sorting system).
This means that I can get a link from Dropbox to share any subject folder and post it for my kids. So all I have to do to make notes available is to make sure that they’re filed under the proper subject in Notability. For example.