I could do a Win 11 clean install on another drive, and see if the Widgets work. But that would just verify it's it a hardware issue. Not really fix the problem or tell me why the Widgets are broke when updating from Win 10 with all current drivers. I even tried older Nvidia driver from a few months ago just to see if maybe the video driver was the problem, and the Widgets we're still broke.
It would sure help isolating or narrowing down the cause of your problem. Up to you.
The only problems I had with Widgets were caused by Intel display drivers, in 2 different older machines, no problems with Nvidia, other than that it always worked fine for me on Updates from windows 10 to windows 11 or new installs of windows 11.
I have 4 machines running Widgets without any issues.