virt-firmware from home:favogt:stagingovmf project
Select Your Operating System
Add repository and install manually
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:favogt:stagingovmf/15.6/home:favogt:stagingovmf.repo zypper refresh zypper install virt-firmware