Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization/openSUSE_Tumbleweed/Virtualization.repo
zypper refresh
zypper install qemu
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization/15.6/Virtualization.repo
zypper refresh
zypper install qemu
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization/15.5/Virtualization.repo
zypper refresh
zypper install qemu