For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:PyQt/openSUSE_Tumbleweed/KDE:Qt:PyQt.repo
zypper refresh
zypper install python-PyQt6-WebEngine
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:PyQt/openSUSE_Factory_ARM/KDE:Qt:PyQt.repo
zypper refresh
zypper install python-PyQt6-WebEngine
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:PyQt/16.0/KDE:Qt:PyQt.repo
zypper refresh
zypper install python-PyQt6-WebEngine
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt:PyQt/15.6/KDE:Qt:PyQt.repo
zypper refresh
zypper install python-PyQt6-WebEngine