Good morning, @KayliWells ...
For starters, are you an instructor or a student? I'm assuming you may be a student because you indicate you cannot see your "Modules" course navigation menu in your Canvas course. If you are a student, your instructor may have hidden the "Modules" course navigation button for some reason. You would need to contact your instructor to ask why he/she hid that menu from you and your classmates. You can contact your instructor inside of Canvas using this Guide:
If you are an instructor, the "Modules" course navigation menu can be hidden or set as visible. If you set it as hidden, a crossed-out eye icon would show next to the menu name in your course navigation. This indicates it's hidden from students...but you can still see it as an instructor. Here's more information on how you can hide course navigation menu buttons from your students:
Hopefully I've covered both scenarios for you. Please let Community members know if you have any other questions about this...thanks!