To see if a student has completed their grade level Journey, click on the student's name in your class and click 'Objectives.' Students who have completed their journey will have the below message under their Journey Overview:
You can also check the Standards Report to see all of the students in your class who have completed their grade level journey and view the objective reporting for dates.
If students have finished their journey, see this article for suggestions: Help! I have students who finished their Journey and I don’t know what to do next!!