libQt6Gui6 from home:cfeck:branches:KDE:Qt6 project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cfeck:branches:KDE:Qt6/openSUSE_Tumbleweed/home:cfeck:branches:KDE:Qt6.repo zypper refresh zypper install libQt6Gui6