These registry keys are completely ignored on the latest version of Windows 11.

MS documented the change here, very buried:

https://www.microsoft.com/en-us/windows/windows-11-specifica...

Look under "Feature deprecations and removals" > "Search Results from the Internet" and you see:

"Windows 11 does not support disabling the return of internet Search results via Registry Key."

They imply there that you can still use Group Policy to make this change, but... that doesn't work either in the latest builds.