Qt package guide does not describe Qt packages

[mzanetti]

flatpak-docs/docs/qt.rst

This claims to describe how to build Qt applications but it does not... It explains how to build KDE packages which use cmake but Qt uses qmake (at least up until Qt5 and still supports it in Qt6).

Following this instructions one runs into bwrap: execvp qmake: No such file or directory and after half an hour of browsing docs and the web I still haven't found an actual working qmake example. Would be nice if this site could be extended for qmake too :)