how to ensure lessons are completed before quiz?

Found the below online, but i cant find the "Restrict navigation" button in the settings.

Can someone help pls?

Restrict Navigation

By default, learners can move freely throughout a course. But sometimes you may need them to view lessons in sequential order. Just change the navigation mode!

With Restrict Navigation toggled to On, learners have to take lessons in order. Selecting this also disables search and the ability to mark lessons as complete.