Yes, I tried all the options listed there, but nothing works on Windows 11. Previously, it was possible to do this using ExplorerPatcher, but it is not available on Windows 11.
It is possible to run ExplorerPatcher on Windows 11 and restore the taskbar from Windows 10, but this would require completely abandoning StartAllBack, which I do not want to do.
When the taskbar is at the bottom, the thumbnail previews don't bother me, but I find it more convenient when the taskbar is at the top, so it's more convenient for me and they don't get in the way.