Hello there, @silverfeline ...
That is quite strange. I have been using the Edge browser on my Windows 11 laptop for quite a while now, and I've never encountered anything like what you have described. Do you have any extensions installed in Edge that might be preventing the nav panel from showing properly? Have you tried clearing your cache/history, restarting Edge, and then logging back in to Canvas to see if that helps?
Have you tried reaching out to Canvas Support to see what they suggest?
If you contact Canvas Support, please come back to this thread to post an update...so we know how they might have helped to resolve the issue. Thanks!