I mean, there’s these ones, for example:

• https://apps.kde.org/kclock/
• https://apps.gnome.org/Clocks/

You can download them as Flatpaks and then this guide supposedly allows running Flatpaks under Windows: https://github.com/AbelFalcon/Run-Flatpak-Windows11
I’m guessing, the Xming thing is needed for graphical applications? I have no idea, if that’s what people generally use for that…