Can you describe in more detail what "Support" tab you are referring to in courses, and what problem you are seeing?
The only default link for support that I'm aware of in Canvas is the "Help" link at the bottom of the dashboard menu, which is outside of any specific course.
Some schools have added "proHelp" links in Canvas, which adds a "?" in the upper right corner of the Canvas window and links to relevant articles in the Canvas community. However, I'm not sure if that's what you're referring to or not.