The problem here is duplicate of the page's title tag and H1 tag (using the "name" and "meta title" fields found in admin), not canonical urls. The pages are different because each page displays different products, specific to that page.
So for example, if you have a category for black shoes, with many products, the urls for each page after page 1 will look like this:
Each of these pages will show different products, so the content is not the same, however, for ALL of these pages the H1 tag and the Title will contain duplicate values.
Ideally we would want something like "- page 2" or "- page 3" appended to the end of both of these tags.
If you download Screaming Frog SEO Spider tool, you can see where all of the duplicates show up.