sof-firmware from home:tiwai:leap-15.5:update project
Select Your Operating System
Add repository and install manually
For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:tiwai:leap-15.5:update/standard/home:tiwai:leap-15.5:update.repo zypper refresh zypper install sof-firmware