Better icon for Windows 10/11
I've noticed that Kate for Windows (downloaded from the Microsoft Store) has a weird task bar icon where it is shown upon on a background box. Instead I think it would be better to have a transparent icon just as on Linux. I recently gained some experience on packaging Qt applications for Windows and I had the same problem with my application. Now, I'm not sure how Kate's windows version is packaged but I assume it's done by using makeappx.exe. I think a way to solve this is to create an icon set using the Visual Studio Asset generators and then using the makepri.exe tool (https://docs.microsoft.com/en-us/windows/uwp/app-resources/makepri-exe-command-options) to correctly generate the resource file need to get a transparent icon.
A somethat easier way (but weird) would be to use this tool https://pub.dev/packages/msix which is written for Flutter, but works for Qt applications as well.