Remember that all tests and quizzes are housed in the Canvas Quizzes navigation, so while you may distinguish between a lower point value quiz and a higher point value test, they will all appear in the same place. These changes can be as simple as changing quiz settings or can be more substantive, such as changing your quiz strategy to make sure students can apply the feedback to later assessments.
You will likely still utilize Canvas Quizzes in your online course, but making a few modifications can improve test security regardless of proctoring and can improve the quality of the assessments. If you decide to make substantial changes to your assessments, as outlined in your previous syllabus, please communicate these to your department chair to see if any further action is needed to maintain curriculum alignment and accreditation (e.g., University Curriculum Committee review). Luckily, there are also plenty of options for changing your testing and assessment practices, such as modifying existing tests to be more secure, redesigning assessments to be more authentic, or combining multiple strategies for varied assessments. There are many reasons to reduce the need for online proctoring and for high-stakes, multiple-choice exams.