yast2-instserver from YaST:SLE-15:SP6 project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-15:SP6/openSUSE_Leap_15.6/YaST:SLE-15:SP6.repo zypper refresh zypper install yast2-instserver