Sensei: Page break block is not working in courses and lessons pages

[renatho]

Steps to Reproduce

1. Create a new course.
2. Add some page break blocks.
3. Open the course in the frontend.
4. See that this is not working.

What I Expected

To paginate the content when clicking in different pages.

What Happened Instead

It doesn't paginate.

PHP / WordPress / Sensei LMS version

PHP 7.4/ WP 5.6 / Sensei 3.6.0

Browser / OS version

Chrome / Mac OS.

Context / Source

It was a request for the https://wpcourses.com/

Not sure we can fix that or if it's a limitation of the block. If we can't fix that, maybe we could create a similar block to Sensei. I think it's a type of interesting block to organize the content.

[jom]

Possible duplicate of #3318, but adds courses.

[donnapep]

Closing as duplicate of #3318.