By default you can only use gradable items such as Assignments and Quizzes to start using Mastery paths. It needs to be something that is gradable to have the criteria which sends students to the appropriate path. The screen shot you posted is for a Page so it would not show there. https://community.canvaslms.com/docs/DOC-26539-how-do-i-assign-a-conditional-assignment-for-students...
Pages also can't be used as 2nd or 3rd items in a mastery path either by default. If you want to use them that way you'll need to edit the page and check the box towards the bottom to "allow in mastery paths" How do I allow a page to be a MasteryPath module item?
Greetings! Thank you for your response. I still have the same issue with an quiz to start the mastery path.. any ideas?
I see the instructions state to open the mastery path on an assignment
Yet, Mastery path seems not to be enabled even though it is within the settings:
My module page: