In new experience, in order to complete an student you need to get to the Course Completion view.

In this view, usually you can see checked the required items the student has completed - usually Feddback or Feedback and Final Exam columns - .

When you hover the mouse over the completed activity for a student, it appears a pop-up showing when (date and time) the student completed this activity.

I will find useful if you can to the pop-up information the score obtained by student in the activity.

Thanks for your attention.

Best regards