Hello @LYDIASINGLETON - is the question from an instructor perspective or more broadly as an institution?
As an instructor, I sort the Grades total from lowest to highest so the students with the lowest grades are listed first. This typically includes those students with the most missing assignments. That way I see them first and that enables me to relentlessly attempt to invigorate their course engagement. Another approach is to make use of 'Course Analytics' (previously named New Analytics). Select the Reports tab and then Missing Assignments. See here: How do I view and download reports in Course Analy... - Instructure Community - 409936
As an institution you are able to use add on tools such as Canvas Data or Instructor Insights, which are premium features.