This is Qt 6.6.1 backport that runs on Windows 7 (what?). The repository is the qtbase module source code with all required modifications already applied.
Approach is based on this [forum thread](https://forum.qt.io/topic/133002/qt-creator-6-0-1-and-qt-6-2-2-running-on-windows-7/60) but better: many improvements amongst important fallbacks to default Qt 6 behaviour when running on newer Windows.
You can use the [prebuild binaries](https://github.com/crystalidea/qt6windows7/releases) or compile Qt yourself (we use the [compile_win](https://github.com/crystalidea/qt-build-tools/tree/master/6.6.1) script).
The only issue noticed is that scalled UI is somewhat too big for 125% scalling option set in Windows 7. Something should be tweaked with dpi settings probably.
