Description of problem: Qt upstream no longer (openly) maintains Qt3d 5.15 branch. There's a KDE backed fork of qt3d 5.15 with backported fixes at https://invent.kde.org/qt/qt/qt3d/-/commits/kde/5.15/ . Is it possible to get the fixes from KDE's fork included in the Fedora builds?
Yes, we are slowly, but surely, working our way through Qt5 stack of packages to include kde/5.15 branch fixes. Done so far include: qt5-qtbase qt5-qtdeclarative qt5-qtwayland