(Solution) for poor look Qt applications within a GTK environment

Coffee break
1

I don’t know if this is the right place… In my post Ugly fonts in programs (QT) like VLC and VirtualBox
the solution is installation: qt6-qtbase-theme-gtk3 and gt5-platformtheme-gtk3. Maybe this help someone.

Ugly fonts in programs (QT) like VLC and VirtualBox
2

and set env var QT_QPA_PLATFORMTHEME=gtk3 and remove QT_STYLE_OVERRIDE