Hi and thanks for reaching out. My name is Bernard a Windows fan like you. I'll be happy to help you out today.
I understand the issue you have, as of the moment it is one of the Windows 11 limitations, as the taskbar can only be at the bottom part of the screen, in addition, what I can highly suggest is to post the issue on the feedback hub so that developers will also be aware of this problem and hopefully the fix will apply as soon as possible.
To send Feedback: https://support.microsoft.com/en-us/windows/sen...
Let me know how it goes and I hope that helps.
Bernard