believe it is known that Objectdock is not compatible with Windows 11 and there are lots of reports similar as yours on the Start11 Start Menu panel shifted when running with Objectdock. Please try uninstall Objectdock and see if the issue goes away.
The problem only started when I installed Windowblinds 11. Up until that point Start 11 and Objectdock have coexisted quite happily. So I did a test, I uninstalled Windowblinds 11 and the issue resolved, Start Menu back to normal and Objectdock still working great. I then reinstalled Windowblinds 11 again and the issue has returned. So its not a start 11/Objectdock conflict. Something within the Windowblinds beta is causing an issue. I expect this with beta software so I'm not particularly worried. But I just thought i would bring it to Stardocks attention.
P.S. I should have thought to include a Screenshot of my Desktop after I Uninstalled WB 11 but I forgot, And I couldn't be bothered going through the whole thing again, Sorry .