We are developing Opigno site and have a requirement of being able to make the lessons reusable between different courses. I would like to ask about possible limitations that we will face in this and if something like this is actually already possible. (I will update the thread with our solution when we have implemented one.)
This is possible out of the box with Opigno.
When editing the lesson, you have in the settings a part named "Groups audience". You can select here one or more course the lesson has to be attached to.