kernel-source-rt from Kernel:SLE15-SP7-RT project
Sty agraw n unessmres nnek/m
Add repository and install manually
For pool run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Kernel:SLE15-SP7-RT/pool/Kernel:SLE15-SP7-RT.repo zypper refresh zypper install kernel-source-rt