I asked the same question on Tutor LMS' support and got the following answer:

To implement a feedback system using a scaling method in Tutor LMS, you can utilize the following approach:

Custom Quiz Questions: While Tutor LMS primarily focuses on quizzes with correct answers, you can create a custom quiz with questions designed for feedback. Use the "Multiple Choice" question type to simulate a scale. For example, create options labeled 1 to 5, where each number represents a level of clarity.

Survey Plugins: Consider integrating a survey or form plugin like WPForms, Gravity Forms, or Formidable Forms. These plugins allow you to create surveys with scaling questions and can be embedded within your course content.

Course Feedback: Tutor LMS has a built-in course feedback feature. You can customize this feature to include questions that use a scaling system. Navigate to Tutor LMS settings and enable course feedback, then customize the feedback form to include your scaling questions.

Custom Code: If you have development resources, you can add custom code to create a feedback form directly within the course content. This approach requires PHP and WordPress development knowledge.

Third-Party Integrations: Use third-party tools like Google Forms or SurveyMonkey to create your feedback survey. You can then link to these surveys from within your course content.

By using one of these methods, you can effectively gather feedback from students using a scaling system without needing correct answers.