Qt Wayland

Display server 
 To utilize Wayland for Qt-based applications install the qt5-wayland and qt6-wayland packages. Optionally, also install qt5ct and qt6ct if you're on a non-KDE desktop environment. 
 Then set the QT_QPA_PLATFORM environment variable to: 
 
 
 wayland for the wayland plugin 
 
 xcb for the X11 plugin 
 
 qt6ct for running Qt6-based applications on non-KDE desktop environments 
 
 qt5ct for running Qt5-based applications on non-KDE desktop environments 
 
 TIP: It may prove useful to set multiple values separated by ; . In case one is not available, the next one is used. 
 QT_QPA_PLATFORM="wayland;qt5ct;xcb"
 
 Use KDE dialogs 
 If some applications (e.g. Telegram) don't use default KDE dialogs, set the following environment variable: 
 QT_QPA_PLATFORMTHEME="flatpak"